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authorKai Blin <kai@samba.org>2009-04-16 14:53:36 +0200
committerKai Blin <kai@samba.org>2009-05-30 09:17:37 +0200
commit57ea909b327812479e9c61f0398f257023a504b4 (patch)
treeaae6e4514a2ff09738d583ed4a4a0a640a8f0702 /nsswitch/libwbclient
parent590a3afc8a22658075235b5b5eb30e977999b3a8 (diff)
downloadsamba-57ea909b327812479e9c61f0398f257023a504b4.tar.gz
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libwbclient: Add async call framework.
Diffstat (limited to 'nsswitch/libwbclient')
-rw-r--r--nsswitch/libwbclient/config.mk15
-rw-r--r--nsswitch/libwbclient/libwbclient.h1
-rw-r--r--nsswitch/libwbclient/wb_reqtrans.c445
-rw-r--r--nsswitch/libwbclient/wbc_async.c687
-rw-r--r--nsswitch/libwbclient/wbc_async.h79
-rw-r--r--nsswitch/libwbclient/wbclient.c2
-rw-r--r--nsswitch/libwbclient/wbclient_internal.h1
7 files changed, 1229 insertions, 1 deletions
diff --git a/nsswitch/libwbclient/config.mk b/nsswitch/libwbclient/config.mk
new file mode 100644
index 0000000000..ffdab159f8
--- /dev/null
+++ b/nsswitch/libwbclient/config.mk
@@ -0,0 +1,15 @@
+[SUBSYSTEM::LIBWBCLIENT]
+PUBLIC_DEPENDENCIES = LIBASYNC_REQ \
+ LIBTEVENT \
+ LIBTALLOC \
+ UTIL_TEVENT
+
+LIBWBCLIENT_OBJ_FILES = $(addprefix $(libwbclientsrcdir)/, wbc_async.o \
+ wbc_guid.o \
+ wbc_idmap.o \
+ wbclient.o \
+ wbc_pam.o \
+ wbc_pwd.o \
+ wbc_sid.o \
+ wbc_util.o \
+ wb_reqtrans.o )
diff --git a/nsswitch/libwbclient/libwbclient.h b/nsswitch/libwbclient/libwbclient.h
index 74cba7e796..5a25cf462c 100644
--- a/nsswitch/libwbclient/libwbclient.h
+++ b/nsswitch/libwbclient/libwbclient.h
@@ -36,6 +36,7 @@
/* Public headers */
#include "wbclient.h"
+#include "wbc_async.h"
/* Private headers */
diff --git a/nsswitch/libwbclient/wb_reqtrans.c b/nsswitch/libwbclient/wb_reqtrans.c
new file mode 100644
index 0000000000..84ed7198f2
--- /dev/null
+++ b/nsswitch/libwbclient/wb_reqtrans.c
@@ -0,0 +1,445 @@
+/*
+ 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 "replace.h"
+#include "system/filesys.h"
+#include "system/network.h"
+#include <talloc.h>
+#include <tevent.h>
+struct fd_event;
+struct event_context;
+#include "lib/async_req/async_sock.h"
+#include "lib/util/tevent_unix.h"
+#include "nsswitch/winbind_struct_protocol.h"
+#include "nsswitch/libwbclient/wbclient.h"
+#include "nsswitch/libwbclient/wbc_async.h"
+
+#ifdef DBGC_CLASS
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_WINBIND
+#endif
+
+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/nsswitch/libwbclient/wbc_async.c b/nsswitch/libwbclient/wbc_async.c
new file mode 100644
index 0000000000..141c9816aa
--- /dev/null
+++ b/nsswitch/libwbclient/wbc_async.c
@@ -0,0 +1,687 @@
+/*
+ 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 "replace.h"
+#include "system/filesys.h"
+#include "system/network.h"
+#include <talloc.h>
+#include <tevent.h>
+struct fd_event;
+struct event_context;
+#include "lib/async_req/async_sock.h"
+#include "nsswitch/winbind_struct_protocol.h"
+#include "nsswitch/libwbclient/wbclient.h"
+#include "nsswitch/libwbclient/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;
+}
diff --git a/nsswitch/libwbclient/wbc_async.h b/nsswitch/libwbclient/wbc_async.h
new file mode 100644
index 0000000000..a2e0eed448
--- /dev/null
+++ b/nsswitch/libwbclient/wbc_async.h
@@ -0,0 +1,79 @@
+/*
+ Unix SMB/CIFS implementation.
+ Headers for the async winbind client library
+ 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/>.
+*/
+
+#ifndef _WBC_ASYNC_H_
+#define _WBC_ASYNC_H_
+
+#include <talloc.h>
+#include <tevent.h>
+#include "nsswitch/libwbclient/wbclient.h"
+
+struct wb_context;
+struct winbindd_request;
+struct winbindd_response;
+
+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);
+wbcErr wb_trans_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+ struct winbindd_response **presponse);
+struct wb_context *wb_context_init(TALLOC_CTX *mem_ctx);
+
+/* Definitions from wb_reqtrans.c */
+wbcErr map_wbc_err_from_errno(int error);
+
+bool tevent_req_is_wbcerr(struct tevent_req *req, wbcErr *pwbc_err);
+wbcErr tevent_req_simple_recv_wbcerr(struct tevent_req *req);
+
+struct tevent_req *wb_req_read_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ int fd, size_t max_extra_data);
+ssize_t wb_req_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+ struct winbindd_request **preq, int *err);
+
+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);
+ssize_t wb_req_write_recv(struct tevent_req *req, int *err);
+
+struct tevent_req *wb_resp_read_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev, int fd);
+ssize_t wb_resp_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+ struct winbindd_response **presp, int *err);
+
+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);
+ssize_t wb_resp_write_recv(struct tevent_req *req, int *err);
+
+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);
+int wb_simple_trans_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+ struct winbindd_response **presponse, int *err);
+
+#endif /*_WBC_ASYNC_H_*/
diff --git a/nsswitch/libwbclient/wbclient.c b/nsswitch/libwbclient/wbclient.c
index f5c72315f2..77b7e12d04 100644
--- a/nsswitch/libwbclient/wbclient.c
+++ b/nsswitch/libwbclient/wbclient.c
@@ -22,6 +22,8 @@
/* Required Headers */
+#include "lib/talloc/talloc.h"
+#include "lib/tevent/tevent.h"
#include "libwbclient.h"
/* From wb_common.c */
diff --git a/nsswitch/libwbclient/wbclient_internal.h b/nsswitch/libwbclient/wbclient_internal.h
index fc03c5409b..2d103ab3df 100644
--- a/nsswitch/libwbclient/wbclient_internal.h
+++ b/nsswitch/libwbclient/wbclient_internal.h
@@ -28,5 +28,4 @@ wbcErr wbcRequestResponse(int cmd,
struct winbindd_request *request,
struct winbindd_response *response);
-
#endif /* _WBCLIENT_INTERNAL_H */