libwbclient: Add async call framework.

2 files changed, 0 insertions, 1111 deletions

diff --git a/source3/lib/wb_reqtrans.c b/source3/lib/wb_reqtrans.c
deleted file mode 100644
index 7088925927..0000000000
--- a/source3/lib/wb_reqtrans.c
+++ /dev/null
@@ -1,433 +0,0 @@
-/*
-   Unix SMB/CIFS implementation.
-
-   Async transfer of winbindd_request and _response structs
-
-   Copyright (C) Volker Lendecke 2008
-
-     ** NOTE! The following LGPL license applies to the wbclient
-     ** library. This does NOT imply that all of Samba is released
-     ** under the LGPL
-
-   This library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 3 of the License, or (at your option) any later version.
-
-   This library 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
-   Library General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "includes.h"
-#include "wbc_async.h"
-
-#undef DBGC_CLASS
-#define DBGC_CLASS DBGC_WINBIND
-
-struct req_read_state {
-	struct winbindd_request *wb_req;
-	size_t max_extra_data;
-	ssize_t ret;
-};
-
-static ssize_t wb_req_more(uint8_t *buf, size_t buflen, void *private_data);
-static void wb_req_read_done(struct tevent_req *subreq);
-
-struct tevent_req *wb_req_read_send(TALLOC_CTX *mem_ctx,
-				    struct tevent_context *ev,
-				    int fd, size_t max_extra_data)
-{
-	struct tevent_req *req, *subreq;
-	struct req_read_state *state;
-
-	req = tevent_req_create(mem_ctx, &state, struct req_read_state);
-	if (req == NULL) {
-		return NULL;
-	}
-	state->max_extra_data = max_extra_data;
-
-	subreq = read_packet_send(state, ev, fd, 4, wb_req_more, state);
-	if (tevent_req_nomem(subreq, req)) {
-		return tevent_req_post(req, ev);
-	}
-	tevent_req_set_callback(subreq, wb_req_read_done, req);
-	return req;
-}
-
-static ssize_t wb_req_more(uint8_t *buf, size_t buflen, void *private_data)
-{
-	struct req_read_state *state = talloc_get_type_abort(
-		private_data, struct req_read_state);
-	struct winbindd_request *req = (struct winbindd_request *)buf;
-
-	if (buflen == 4) {
-		if (req->length != sizeof(struct winbindd_request)) {
-			DEBUG(0, ("wb_req_read_len: Invalid request size "
-				  "received: %d (expected %d)\n",
-				  (int)req->length,
-				  (int)sizeof(struct winbindd_request)));
-			return -1;
-		}
-		return sizeof(struct winbindd_request) - 4;
-	}
-
-	if ((state->max_extra_data != 0)
-	    && (req->extra_len > state->max_extra_data)) {
-		DEBUG(3, ("Got request with %d bytes extra data on "
-			  "unprivileged socket\n", (int)req->extra_len));
-		return -1;
-	}
-
-	return req->extra_len;
-}
-
-static void wb_req_read_done(struct tevent_req *subreq)
-{
-	struct tevent_req *req = tevent_req_callback_data(
-		subreq, struct tevent_req);
-	struct req_read_state *state = tevent_req_data(
-		req, struct req_read_state);
-	int err;
-	uint8_t *buf;
-
-	state->ret = read_packet_recv(subreq, state, &buf, &err);
-	TALLOC_FREE(subreq);
-	if (state->ret == -1) {
-		tevent_req_error(req, err);
-		return;
-	}
-
-	state->wb_req = (struct winbindd_request *)buf;
-
-	if (state->wb_req->extra_len != 0) {
-		state->wb_req->extra_data.data =
-			(char *)buf + sizeof(struct winbindd_request);
-	} else {
-		state->wb_req->extra_data.data = NULL;
-	}
-	tevent_req_done(req);
-}
-
-ssize_t wb_req_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
-			 struct winbindd_request **preq, int *err)
-{
-	struct req_read_state *state = tevent_req_data(
-		req, struct req_read_state);
-
-	if (tevent_req_is_unix_error(req, err)) {
-		return -1;
-	}
-	*preq = talloc_move(mem_ctx, &state->wb_req);
-	return state->ret;
-}
-
-struct req_write_state {
-	struct iovec iov[2];
-	ssize_t ret;
-};
-
-static void wb_req_write_done(struct tevent_req *subreq);
-
-struct tevent_req *wb_req_write_send(TALLOC_CTX *mem_ctx,
-				     struct tevent_context *ev,
-				     struct tevent_queue *queue, int fd,
-				     struct winbindd_request *wb_req)
-{
-	struct tevent_req *req, *subreq;
-	struct req_write_state *state;
-	int count = 1;
-
-	req = tevent_req_create(mem_ctx, &state, struct req_write_state);
-	if (req == NULL) {
-		return NULL;
-	}
-
-	state->iov[0].iov_base = (void *)wb_req;
-	state->iov[0].iov_len = sizeof(struct winbindd_request);
-
-	if (wb_req->extra_len != 0) {
-		state->iov[1].iov_base = (void *)wb_req->extra_data.data;
-		state->iov[1].iov_len = wb_req->extra_len;
-		count = 2;
-	}
-
-	subreq = writev_send(state, ev, queue, fd, true, state->iov, count);
-	if (tevent_req_nomem(subreq, req)) {
-		return tevent_req_post(req, ev);
-	}
-	tevent_req_set_callback(subreq, wb_req_write_done, req);
-	return req;
-}
-
-static void wb_req_write_done(struct tevent_req *subreq)
-{
-	struct tevent_req *req = tevent_req_callback_data(
-		subreq, struct tevent_req);
-	struct req_write_state *state = tevent_req_data(
-		req, struct req_write_state);
-	int err;
-
-	state->ret = writev_recv(subreq, &err);
-	TALLOC_FREE(subreq);
-	if (state->ret < 0) {
-		tevent_req_error(req, err);
-		return;
-	}
-	tevent_req_done(req);
-}
-
-ssize_t wb_req_write_recv(struct tevent_req *req, int *err)
-{
-	struct req_write_state *state = tevent_req_data(
-		req, struct req_write_state);
-
-	if (tevent_req_is_unix_error(req, err)) {
-		return -1;
-	}
-	return state->ret;
-}
-
-struct resp_read_state {
-	struct winbindd_response *wb_resp;
-	ssize_t ret;
-};
-
-static ssize_t wb_resp_more(uint8_t *buf, size_t buflen, void *private_data);
-static void wb_resp_read_done(struct tevent_req *subreq);
-
-struct tevent_req *wb_resp_read_send(TALLOC_CTX *mem_ctx,
-				     struct tevent_context *ev, int fd)
-{
-	struct tevent_req *req, *subreq;
-	struct resp_read_state *state;
-
-	req = tevent_req_create(mem_ctx, &state, struct resp_read_state);
-	if (req == NULL) {
-		return NULL;
-	}
-
-	subreq = read_packet_send(state, ev, fd, 4, wb_resp_more, state);
-	if (tevent_req_nomem(subreq, req)) {
-		return tevent_req_post(req, ev);
-	}
-	tevent_req_set_callback(subreq, wb_resp_read_done, req);
-	return req;
-}
-
-static ssize_t wb_resp_more(uint8_t *buf, size_t buflen, void *private_data)
-{
-	struct winbindd_response *resp = (struct winbindd_response *)buf;
-
-	if (buflen == 4) {
-		if (resp->length < sizeof(struct winbindd_response)) {
-			DEBUG(0, ("wb_resp_read_len: Invalid response size "
-				  "received: %d (expected at least%d)\n",
-				  (int)resp->length,
-				  (int)sizeof(struct winbindd_response)));
-			return -1;
-		}
-	}
-	return resp->length - buflen;
-}
-
-static void wb_resp_read_done(struct tevent_req *subreq)
-{
-	struct tevent_req *req = tevent_req_callback_data(
-		subreq, struct tevent_req);
-	struct resp_read_state *state = tevent_req_data(
-		req, struct resp_read_state);
-	uint8_t *buf;
-	int err;
-
-	state->ret = read_packet_recv(subreq, state, &buf, &err);
-	TALLOC_FREE(subreq);
-	if (state->ret == -1) {
-		tevent_req_error(req, err);
-		return;
-	}
-
-	state->wb_resp = (struct winbindd_response *)buf;
-
-	if (state->wb_resp->length > sizeof(struct winbindd_response)) {
-		state->wb_resp->extra_data.data =
-			(char *)buf + sizeof(struct winbindd_response);
-	} else {
-		state->wb_resp->extra_data.data = NULL;
-	}
-	tevent_req_done(req);
-}
-
-ssize_t wb_resp_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
-			  struct winbindd_response **presp, int *err)
-{
-	struct resp_read_state *state = tevent_req_data(
-		req, struct resp_read_state);
-
-	if (tevent_req_is_unix_error(req, err)) {
-		return -1;
-	}
-	*presp = talloc_move(mem_ctx, &state->wb_resp);
-	return state->ret;
-}
-
-struct resp_write_state {
-	struct iovec iov[2];
-	ssize_t ret;
-};
-
-static void wb_resp_write_done(struct tevent_req *subreq);
-
-struct tevent_req *wb_resp_write_send(TALLOC_CTX *mem_ctx,
-				      struct tevent_context *ev,
-				      struct tevent_queue *queue, int fd,
-				      struct winbindd_response *wb_resp)
-{
-	struct tevent_req *req, *subreq;
-	struct resp_write_state *state;
-	int count = 1;
-
-	req = tevent_req_create(mem_ctx, &state, struct resp_write_state);
-	if (req == NULL) {
-		return NULL;
-	}
-
-	state->iov[0].iov_base = (void *)wb_resp;
-	state->iov[0].iov_len = sizeof(struct winbindd_response);
-
-	if (wb_resp->length > sizeof(struct winbindd_response)) {
-		state->iov[1].iov_base = (void *)wb_resp->extra_data.data;
-		state->iov[1].iov_len =
-			wb_resp->length - sizeof(struct winbindd_response);
-		count = 2;
-	}
-
-	subreq = writev_send(state, ev, queue, fd, true, state->iov, count);
-	if (tevent_req_nomem(subreq, req)) {
-		return tevent_req_post(req, ev);
-	}
-	tevent_req_set_callback(subreq, wb_resp_write_done, req);
-	return req;
-}
-
-static void wb_resp_write_done(struct tevent_req *subreq)
-{
-	struct tevent_req *req = tevent_req_callback_data(
-		subreq, struct tevent_req);
-	struct resp_write_state *state = tevent_req_data(
-		req, struct resp_write_state);
-	int err;
-
-	state->ret = writev_recv(subreq, &err);
-	TALLOC_FREE(subreq);
-	if (state->ret < 0) {
-		tevent_req_error(req, err);
-		return;
-	}
-	tevent_req_done(req);
-}
-
-ssize_t wb_resp_write_recv(struct tevent_req *req, int *err)
-{
-	struct resp_write_state *state = tevent_req_data(
-		req, struct resp_write_state);
-
-	if (tevent_req_is_unix_error(req, err)) {
-		return -1;
-	}
-	return state->ret;
-}
-
-struct wb_simple_trans_state {
-	struct tevent_context *ev;
-	int fd;
-	struct winbindd_response *wb_resp;
-};
-
-static void wb_simple_trans_write_done(struct tevent_req *subreq);
-static void wb_simple_trans_read_done(struct tevent_req *subreq);
-
-struct tevent_req *wb_simple_trans_send(TALLOC_CTX *mem_ctx,
-					struct tevent_context *ev,
-					struct tevent_queue *queue, int fd,
-					struct winbindd_request *wb_req)
-{
-	struct tevent_req *req, *subreq;
-	struct wb_simple_trans_state *state;
-
-	req = tevent_req_create(mem_ctx, &state, struct wb_simple_trans_state);
-	if (req == NULL) {
-		return NULL;
-	}
-
-	wb_req->length = sizeof(struct winbindd_request);
-
-	state->ev = ev;
-	state->fd = fd;
-
-	subreq = wb_req_write_send(state, ev, queue, fd, wb_req);
-	if (tevent_req_nomem(subreq, req)) {
-		return tevent_req_post(req, ev);
-	}
-	tevent_req_set_callback(subreq, wb_simple_trans_write_done, req);
-
-	return req;
-}
-
-static void wb_simple_trans_write_done(struct tevent_req *subreq)
-{
-	struct tevent_req *req = tevent_req_callback_data(
-		subreq, struct tevent_req);
-	struct wb_simple_trans_state *state = tevent_req_data(
-		req, struct wb_simple_trans_state);
-	ssize_t ret;
-	int err;
-
-	ret = wb_req_write_recv(subreq, &err);
-	TALLOC_FREE(subreq);
-	if (ret == -1) {
-		tevent_req_error(req, err);
-		return;
-	}
-	subreq = wb_resp_read_send(state, state->ev, state->fd);
-	if (tevent_req_nomem(subreq, req)) {
-		return;
-	}
-	tevent_req_set_callback(subreq, wb_simple_trans_read_done, req);
-}
-
-static void wb_simple_trans_read_done(struct tevent_req *subreq)
-{
-	struct tevent_req *req = tevent_req_callback_data(
-		subreq, struct tevent_req);
-	struct wb_simple_trans_state *state = tevent_req_data(
-		req, struct wb_simple_trans_state);
-	ssize_t ret;
-	int err;
-
-	ret = wb_resp_read_recv(subreq, state, &state->wb_resp, &err);
-	TALLOC_FREE(subreq);
-	if (ret == -1) {
-		tevent_req_error(req, err);
-		return;
-	}
-
-	tevent_req_done(req);
-}
-
-int wb_simple_trans_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
-			 struct winbindd_response **presponse, int *err)
-{
-	struct wb_simple_trans_state *state = tevent_req_data(
-		req, struct wb_simple_trans_state);
-
-	if (tevent_req_is_unix_error(req, err)) {
-		return -1;
-	}
-	*presponse = talloc_move(mem_ctx, &state->wb_resp);
-	return 0;
-}
diff --git a/source3/lib/wbclient.c b/source3/lib/wbclient.c
deleted file mode 100644
index d0070ea349..0000000000
--- a/source3/lib/wbclient.c
+++ /dev/null
@@ -1,678 +0,0 @@
-/*
-   Unix SMB/CIFS implementation.
-   Infrastructure for async winbind requests
-   Copyright (C) Volker Lendecke 2008
-
-     ** NOTE! The following LGPL license applies to the wbclient
-     ** library. This does NOT imply that all of Samba is released
-     ** under the LGPL
-
-   This library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 3 of the License, or (at your option) any later version.
-
-   This library 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
-   Library General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "includes.h"
-#include "wbc_async.h"
-
-wbcErr map_wbc_err_from_errno(int error)
-{
-	switch(error) {
-	case EPERM:
-	case EACCES:
-		return WBC_ERR_AUTH_ERROR;
-	case ENOMEM:
-		return WBC_ERR_NO_MEMORY;
-	case EIO:
-	default:
-		return WBC_ERR_UNKNOWN_FAILURE;
-	}
-}
-
-bool tevent_req_is_wbcerr(struct tevent_req *req, wbcErr *pwbc_err)
-{
-	enum tevent_req_state state;
-	uint64_t error;
-	if (!tevent_req_is_error(req, &state, &error)) {
-		*pwbc_err = WBC_ERR_SUCCESS;
-		return false;
-	}
-
-	switch (state) {
-	case TEVENT_REQ_USER_ERROR:
-		*pwbc_err = error;
-		break;
-	case TEVENT_REQ_TIMED_OUT:
-		*pwbc_err = WBC_ERR_UNKNOWN_FAILURE;
-		break;
-	case TEVENT_REQ_NO_MEMORY:
-		*pwbc_err = WBC_ERR_NO_MEMORY;
-		break;
-	default:
-		*pwbc_err = WBC_ERR_UNKNOWN_FAILURE;
-		break;
-	}
-	return true;
-}
-
-wbcErr tevent_req_simple_recv_wbcerr(struct tevent_req *req)
-{
-	wbcErr wbc_err;
-
-	if (tevent_req_is_wbcerr(req, &wbc_err)) {
-		return wbc_err;
-	}
-
-	return WBC_ERR_SUCCESS;
-}
-
-struct wb_context {
-	struct tevent_queue *queue;
-	int fd;
-	bool is_priv;
-};
-
-static int make_nonstd_fd(int fd)
-{
-	int i;
-	int sys_errno = 0;
-	int fds[3];
-	int num_fds = 0;
-
-	if (fd == -1) {
-		return -1;
-	}
-	while (fd < 3) {
-		fds[num_fds++] = fd;
-		fd = dup(fd);
-		if (fd == -1) {
-			sys_errno = errno;
-			break;
-		}
-	}
-	for (i=0; i<num_fds; i++) {
-		close(fds[i]);
-	}
-	if (fd == -1) {
-		errno = sys_errno;
-	}
-	return fd;
-}
-
-/****************************************************************************
- Set a fd into blocking/nonblocking mode. Uses POSIX O_NONBLOCK if available,
- else
- if SYSV use O_NDELAY
- if BSD use FNDELAY
- Set close on exec also.
-****************************************************************************/
-
-static int make_safe_fd(int fd)
-{
-	int result, flags;
-	int new_fd = make_nonstd_fd(fd);
-
-	if (new_fd == -1) {
-		goto fail;
-	}
-
-	/* Socket should be nonblocking. */
-
-#ifdef O_NONBLOCK
-#define FLAG_TO_SET O_NONBLOCK
-#else
-#ifdef SYSV
-#define FLAG_TO_SET O_NDELAY
-#else /* BSD */
-#define FLAG_TO_SET FNDELAY
-#endif
-#endif
-
-	if ((flags = fcntl(new_fd, F_GETFL)) == -1) {
-		goto fail;
-	}
-
-	flags |= FLAG_TO_SET;
-	if (fcntl(new_fd, F_SETFL, flags) == -1) {
-		goto fail;
-	}
-
-#undef FLAG_TO_SET
-
-	/* Socket should be closed on exec() */
-#ifdef FD_CLOEXEC
-	result = flags = fcntl(new_fd, F_GETFD, 0);
-	if (flags >= 0) {
-		flags |= FD_CLOEXEC;
-		result = fcntl( new_fd, F_SETFD, flags );
-	}
-	if (result < 0) {
-		goto fail;
-	}
-#endif
-	return new_fd;
-
- fail:
-	if (new_fd != -1) {
-		int sys_errno = errno;
-		close(new_fd);
-		errno = sys_errno;
-	}
-	return -1;
-}
-
-struct wb_context *wb_context_init(TALLOC_CTX *mem_ctx)
-{
-	struct wb_context *result;
-
-	result = talloc(mem_ctx, struct wb_context);
-	if (result == NULL) {
-		return NULL;
-	}
-	result->queue = tevent_queue_create(result, "wb_trans");
-	if (result->queue == NULL) {
-		TALLOC_FREE(result);
-		return NULL;
-	}
-	result->fd = -1;
-	result->is_priv = false;
-	return result;
-}
-
-struct wb_connect_state {
-	int dummy;
-};
-
-static void wbc_connect_connected(struct tevent_req *subreq);
-
-static struct tevent_req *wb_connect_send(TALLOC_CTX *mem_ctx,
-					  struct tevent_context *ev,
-					  struct wb_context *wb_ctx,
-					  const char *dir)
-{
-	struct tevent_req *result, *subreq;
-	struct wb_connect_state *state;
-	struct sockaddr_un sunaddr;
-	struct stat st;
-	char *path = NULL;
-	wbcErr wbc_err;
-
-	result = tevent_req_create(mem_ctx, &state, struct wb_connect_state);
-	if (result == NULL) {
-		return NULL;
-	}
-
-	if (wb_ctx->fd != -1) {
-		close(wb_ctx->fd);
-		wb_ctx->fd = -1;
-	}
-
-	/* Check permissions on unix socket directory */
-
-	if (lstat(dir, &st) == -1) {
-		wbc_err = WBC_ERR_WINBIND_NOT_AVAILABLE;
-		goto post_status;
-	}
-
-	if (!S_ISDIR(st.st_mode) ||
-	    (st.st_uid != 0 && st.st_uid != geteuid())) {
-		wbc_err = WBC_ERR_WINBIND_NOT_AVAILABLE;
-		goto post_status;
-	}
-
-	/* Connect to socket */
-
-	path = talloc_asprintf(talloc_tos(), "%s/%s", dir,
-			       WINBINDD_SOCKET_NAME);
-	if (path == NULL) {
-		goto nomem;
-	}
-
-	sunaddr.sun_family = AF_UNIX;
-	strlcpy(sunaddr.sun_path, path, sizeof(sunaddr.sun_path));
-	TALLOC_FREE(path);
-
-	/* If socket file doesn't exist, don't bother trying to connect
-	   with retry.  This is an attempt to make the system usable when
-	   the winbindd daemon is not running. */
-
-	if ((lstat(sunaddr.sun_path, &st) == -1)
-	    || !S_ISSOCK(st.st_mode)
-	    || (st.st_uid != 0 && st.st_uid != geteuid())) {
-		wbc_err = WBC_ERR_WINBIND_NOT_AVAILABLE;
-		goto post_status;
-	}
-
-	wb_ctx->fd = make_safe_fd(socket(AF_UNIX, SOCK_STREAM, 0));
-	if (wb_ctx->fd == -1) {
-		wbc_err = map_wbc_err_from_errno(errno);
-		goto post_status;
-	}
-
-	subreq = async_connect_send(mem_ctx, ev, wb_ctx->fd,
-				    (struct sockaddr *)(void *)&sunaddr,
-				    sizeof(sunaddr));
-	if (subreq == NULL) {
-		goto nomem;
-	}
-	tevent_req_set_callback(subreq, wbc_connect_connected, result);
-	return result;
-
- post_status:
-	tevent_req_error(result, wbc_err);
-	return tevent_req_post(result, ev);
- nomem:
-	TALLOC_FREE(result);
-	return NULL;
-}
-
-static void wbc_connect_connected(struct tevent_req *subreq)
-{
-	struct tevent_req *req = tevent_req_callback_data(
-		subreq, struct tevent_req);
-	int res, err;
-
-	res = async_connect_recv(subreq, &err);
-	TALLOC_FREE(subreq);
-	if (res == -1) {
-		tevent_req_error(req, map_wbc_err_from_errno(err));
-		return;
-	}
-	tevent_req_done(req);
-}
-
-static wbcErr wb_connect_recv(struct tevent_req *req)
-{
-	return tevent_req_simple_recv_wbcerr(req);
-}
-
-static const char *winbindd_socket_dir(void)
-{
-#ifdef SOCKET_WRAPPER
-	const char *env_dir;
-
-	env_dir = getenv(WINBINDD_SOCKET_DIR_ENVVAR);
-	if (env_dir) {
-		return env_dir;
-	}
-#endif
-
-	return WINBINDD_SOCKET_DIR;
-}
-
-struct wb_open_pipe_state {
-	struct wb_context *wb_ctx;
-	struct tevent_context *ev;
-	bool need_priv;
-	struct winbindd_request wb_req;
-};
-
-static void wb_open_pipe_connect_nonpriv_done(struct tevent_req *subreq);
-static void wb_open_pipe_ping_done(struct tevent_req *subreq);
-static void wb_open_pipe_getpriv_done(struct tevent_req *subreq);
-static void wb_open_pipe_connect_priv_done(struct tevent_req *subreq);
-
-static struct tevent_req *wb_open_pipe_send(TALLOC_CTX *mem_ctx,
-					    struct tevent_context *ev,
-					    struct wb_context *wb_ctx,
-					    bool need_priv)
-{
-	struct tevent_req *result, *subreq;
-	struct wb_open_pipe_state *state;
-
-	result = tevent_req_create(mem_ctx, &state, struct wb_open_pipe_state);
-	if (result == NULL) {
-		return NULL;
-	}
-	state->wb_ctx = wb_ctx;
-	state->ev = ev;
-	state->need_priv = need_priv;
-
-	if (wb_ctx->fd != -1) {
-		close(wb_ctx->fd);
-		wb_ctx->fd = -1;
-	}
-
-	subreq = wb_connect_send(state, ev, wb_ctx, winbindd_socket_dir());
-	if (subreq == NULL) {
-		goto fail;
-	}
-	tevent_req_set_callback(subreq, wb_open_pipe_connect_nonpriv_done,
-				result);
-	return result;
-
- fail:
-	TALLOC_FREE(result);
-	return NULL;
-}
-
-static void wb_open_pipe_connect_nonpriv_done(struct tevent_req *subreq)
-{
-	struct tevent_req *req = tevent_req_callback_data(
-		subreq, struct tevent_req);
-	struct wb_open_pipe_state *state = tevent_req_data(
-		req, struct wb_open_pipe_state);
-	wbcErr wbc_err;
-
-	wbc_err = wb_connect_recv(subreq);
-	TALLOC_FREE(subreq);
-	if (!WBC_ERROR_IS_OK(wbc_err)) {
-		state->wb_ctx->is_priv = true;
-		tevent_req_error(req, wbc_err);
-		return;
-	}
-
-	ZERO_STRUCT(state->wb_req);
-	state->wb_req.cmd = WINBINDD_INTERFACE_VERSION;
-	state->wb_req.pid = getpid();
-
-	subreq = wb_simple_trans_send(state, state->ev, NULL,
-				      state->wb_ctx->fd, &state->wb_req);
-	if (tevent_req_nomem(subreq, req)) {
-		return;
-	}
-	tevent_req_set_callback(subreq, wb_open_pipe_ping_done, req);
-}
-
-static void wb_open_pipe_ping_done(struct tevent_req *subreq)
-{
-	struct tevent_req *req = tevent_req_callback_data(
-		subreq, struct tevent_req);
-	struct wb_open_pipe_state *state = tevent_req_data(
-		req, struct wb_open_pipe_state);
-	struct winbindd_response *wb_resp;
-	int ret, err;
-
-	ret = wb_simple_trans_recv(subreq, state, &wb_resp, &err);
-	TALLOC_FREE(subreq);
-	if (ret == -1) {
-		tevent_req_error(req, map_wbc_err_from_errno(err));
-		return;
-	}
-
-	if (!state->need_priv) {
-		tevent_req_done(req);
-		return;
-	}
-
-	state->wb_req.cmd = WINBINDD_PRIV_PIPE_DIR;
-	state->wb_req.pid = getpid();
-
-	subreq = wb_simple_trans_send(state, state->ev, NULL,
-				      state->wb_ctx->fd, &state->wb_req);
-	if (tevent_req_nomem(subreq, req)) {
-		return;
-	}
-	tevent_req_set_callback(subreq, wb_open_pipe_getpriv_done, req);
-}
-
-static void wb_open_pipe_getpriv_done(struct tevent_req *subreq)
-{
-	struct tevent_req *req = tevent_req_callback_data(
-		subreq, struct tevent_req);
-	struct wb_open_pipe_state *state = tevent_req_data(
-		req, struct wb_open_pipe_state);
-	struct winbindd_response *wb_resp = NULL;
-	int ret, err;
-
-	ret = wb_simple_trans_recv(subreq, state, &wb_resp, &err);
-	TALLOC_FREE(subreq);
-	if (ret == -1) {
-		tevent_req_error(req, map_wbc_err_from_errno(err));
-		return;
-	}
-
-	close(state->wb_ctx->fd);
-	state->wb_ctx->fd = -1;
-
-	subreq = wb_connect_send(state, state->ev, state->wb_ctx,
-				  (char *)wb_resp->extra_data.data);
-	TALLOC_FREE(wb_resp);
-	if (tevent_req_nomem(subreq, req)) {
-		return;
-	}
-	tevent_req_set_callback(subreq, wb_open_pipe_connect_priv_done, req);
-}
-
-static void wb_open_pipe_connect_priv_done(struct tevent_req *subreq)
-{
-	struct tevent_req *req = tevent_req_callback_data(
-		subreq, struct tevent_req);
-	struct wb_open_pipe_state *state = tevent_req_data(
-		req, struct wb_open_pipe_state);
-	wbcErr wbc_err;
-
-	wbc_err = wb_connect_recv(subreq);
-	TALLOC_FREE(subreq);
-	if (!WBC_ERROR_IS_OK(wbc_err)) {
-		tevent_req_error(req, wbc_err);
-		return;
-	}
-	state->wb_ctx->is_priv = true;
-	tevent_req_done(req);
-}
-
-static wbcErr wb_open_pipe_recv(struct tevent_req *req)
-{
-	return tevent_req_simple_recv_wbcerr(req);
-}
-
-struct wb_trans_state {
-	struct wb_trans_state *prev, *next;
-	struct wb_context *wb_ctx;
-	struct tevent_context *ev;
-	struct winbindd_request *wb_req;
-	struct winbindd_response *wb_resp;
-	bool need_priv;
-};
-
-static bool closed_fd(int fd)
-{
-	struct timeval tv;
-	fd_set r_fds;
-	int selret;
-
-	if (fd == -1) {
-		return true;
-	}
-
-	FD_ZERO(&r_fds);
-	FD_SET(fd, &r_fds);
-	ZERO_STRUCT(tv);
-
-	selret = select(fd+1, &r_fds, NULL, NULL, &tv);
-	if (selret == -1) {
-		return true;
-	}
-	if (selret == 0) {
-		return false;
-	}
-	return (FD_ISSET(fd, &r_fds));
-}
-
-static void wb_trans_trigger(struct tevent_req *req, void *private_data);
-static void wb_trans_connect_done(struct tevent_req *subreq);
-static void wb_trans_done(struct tevent_req *subreq);
-static void wb_trans_retry_wait_done(struct tevent_req *subreq);
-
-struct tevent_req *wb_trans_send(TALLOC_CTX *mem_ctx,
-				 struct tevent_context *ev,
-				 struct wb_context *wb_ctx, bool need_priv,
-				 struct winbindd_request *wb_req)
-{
-	struct tevent_req *req;
-	struct wb_trans_state *state;
-
-	req = tevent_req_create(mem_ctx, &state, struct wb_trans_state);
-	if (req == NULL) {
-		return NULL;
-	}
-	state->wb_ctx = wb_ctx;
-	state->ev = ev;
-	state->wb_req = wb_req;
-	state->need_priv = need_priv;
-
-	if (!tevent_queue_add(wb_ctx->queue, ev, req, wb_trans_trigger,
-			      NULL)) {
-		tevent_req_nomem(NULL, req);
-		return tevent_req_post(req, ev);
-	}
-	return req;
-}
-
-static void wb_trans_trigger(struct tevent_req *req, void *private_data)
-{
-	struct wb_trans_state *state = tevent_req_data(
-		req, struct wb_trans_state);
-	struct tevent_req *subreq;
-
-	if ((state->wb_ctx->fd != -1) && closed_fd(state->wb_ctx->fd)) {
-		close(state->wb_ctx->fd);
-		state->wb_ctx->fd = -1;
-	}
-
-	if ((state->wb_ctx->fd == -1)
-	    || (state->need_priv && !state->wb_ctx->is_priv)) {
-		subreq = wb_open_pipe_send(state, state->ev, state->wb_ctx,
-					   state->need_priv);
-		if (tevent_req_nomem(subreq, req)) {
-			return;
-		}
-		tevent_req_set_callback(subreq, wb_trans_connect_done, req);
-		return;
-	}
-
-	state->wb_req->pid = getpid();
-
-	subreq = wb_simple_trans_send(state, state->ev, NULL,
-				      state->wb_ctx->fd, state->wb_req);
-	if (tevent_req_nomem(subreq, req)) {
-		return;
-	}
-	tevent_req_set_callback(subreq, wb_trans_done, req);
-}
-
-static bool wb_trans_retry(struct tevent_req *req,
-			   struct wb_trans_state *state,
-			   wbcErr wbc_err)
-{
-	struct tevent_req *subreq;
-
-	if (WBC_ERROR_IS_OK(wbc_err)) {
-		return false;
-	}
-
-	if (wbc_err == WBC_ERR_WINBIND_NOT_AVAILABLE) {
-		/*
-		 * Winbind not around or we can't connect to the pipe. Fail
-		 * immediately.
-		 */
-		tevent_req_error(req, wbc_err);
-		return true;
-	}
-
-	/*
-	 * The transfer as such failed, retry after one second
-	 */
-
-	if (state->wb_ctx->fd != -1) {
-		close(state->wb_ctx->fd);
-		state->wb_ctx->fd = -1;
-	}
-
-	subreq = tevent_wakeup_send(state, state->ev,
-				    timeval_current_ofs(1, 0));
-	if (tevent_req_nomem(subreq, req)) {
-		return true;
-	}
-	tevent_req_set_callback(subreq, wb_trans_retry_wait_done, req);
-	return true;
-}
-
-static void wb_trans_retry_wait_done(struct tevent_req *subreq)
-{
-	struct tevent_req *req = tevent_req_callback_data(
-		subreq, struct tevent_req);
-	struct wb_trans_state *state = tevent_req_data(
-		req, struct wb_trans_state);
-	bool ret;
-
-	ret = tevent_wakeup_recv(subreq);
-	TALLOC_FREE(subreq);
-	if (!ret) {
-		tevent_req_error(req, WBC_ERR_UNKNOWN_FAILURE);
-		return;
-	}
-
-	subreq = wb_open_pipe_send(state, state->ev, state->wb_ctx,
-				   state->need_priv);
-	if (tevent_req_nomem(subreq, req)) {
-		return;
-	}
-	tevent_req_set_callback(subreq, wb_trans_connect_done, req);
-}
-
-static void wb_trans_connect_done(struct tevent_req *subreq)
-{
-	struct tevent_req *req = tevent_req_callback_data(
-		subreq, struct tevent_req);
-	struct wb_trans_state *state = tevent_req_data(
-		req, struct wb_trans_state);
-	wbcErr wbc_err;
-
-	wbc_err = wb_open_pipe_recv(subreq);
-	TALLOC_FREE(subreq);
-
-	if (wb_trans_retry(req, state, wbc_err)) {
-		return;
-	}
-
-	subreq = wb_simple_trans_send(state, state->ev, NULL,
-				      state->wb_ctx->fd, state->wb_req);
-	if (tevent_req_nomem(subreq, req)) {
-		return;
-	}
-	tevent_req_set_callback(subreq, wb_trans_done, req);
-}
-
-static void wb_trans_done(struct tevent_req *subreq)
-{
-	struct tevent_req *req = tevent_req_callback_data(
-		subreq, struct tevent_req);
-	struct wb_trans_state *state = tevent_req_data(
-		req, struct wb_trans_state);
-	int ret, err;
-
-	ret = wb_simple_trans_recv(subreq, state, &state->wb_resp, &err);
-	TALLOC_FREE(subreq);
-	if ((ret == -1)
-	    && wb_trans_retry(req, state, map_wbc_err_from_errno(err))) {
-		return;
-	}
-
-	tevent_req_done(req);
-}
-
-wbcErr wb_trans_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
-		     struct winbindd_response **presponse)
-{
-	struct wb_trans_state *state = tevent_req_data(
-		req, struct wb_trans_state);
-	wbcErr wbc_err;
-
-	if (tevent_req_is_wbcerr(req, &wbc_err)) {
-		return wbc_err;
-	}
-
-	*presponse = talloc_move(mem_ctx, &state->wb_resp);
-	return WBC_ERR_SUCCESS;
-}