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-rw-r--r--source3/torture/wbc_async.c758
1 files changed, 758 insertions, 0 deletions
diff --git a/source3/torture/wbc_async.c b/source3/torture/wbc_async.c
new file mode 100644
index 0000000..9560e36
--- /dev/null
+++ b/source3/torture/wbc_async.c
@@ -0,0 +1,758 @@
+/*
+ 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>
+#include "lib/async_req/async_sock.h"
+#include "nsswitch/winbind_struct_protocol.h"
+#include "nsswitch/libwbclient/wbclient.h"
+#include "wbc_async.h"
+#include "lib/util/blocking.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 wbc_debug_ops {
+ void (*debug)(void *context, enum wbcDebugLevel level,
+ const char *fmt, va_list ap) PRINTF_ATTRIBUTE(3,0);
+ void *context;
+};
+
+struct wb_context {
+ struct tevent_queue *queue;
+ int fd;
+ bool is_priv;
+ const char *dir;
+ struct wbc_debug_ops debug_ops;
+};
+
+static int make_nonstd_fd(int fd)
+{
+ size_t i;
+ int sys_errno = 0;
+ int fds[3];
+ size_t 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.
+ 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;
+ }
+
+ result = set_blocking(new_fd, false);
+ if (result == -1) {
+ goto fail;
+ }
+
+ /* 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;
+}
+
+/* Just put a prototype to avoid moving the whole function around */
+static const char *winbindd_socket_dir(void);
+
+struct wb_context *wb_context_init(TALLOC_CTX *mem_ctx, const char* dir)
+{
+ struct wb_context *result;
+
+ result = talloc_zero(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;
+
+ if (dir != NULL) {
+ result->dir = talloc_strdup(result, dir);
+ } else {
+ result->dir = winbindd_socket_dir();
+ }
+ if (result->dir == NULL) {
+ TALLOC_FREE(result);
+ return NULL;
+ }
+ 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(mem_ctx, "%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), NULL, NULL, NULL);
+ 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)
+{
+ if (nss_wrapper_enabled()) {
+ const char *env_dir;
+
+ env_dir = getenv("SELFTEST_WINBINDD_SOCKET_DIR");
+ if (env_dir != NULL) {
+ return env_dir;
+ }
+ }
+
+ 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, wb_ctx->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();
+ (void)snprintf(state->wb_req.client_name,
+ sizeof(state->wb_req.client_name),
+ "%s",
+ "TORTURE");
+
+ 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_oom(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,
+ tevent_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;
+}
+
+/********************************************************************
+ * Debug wrapper functions, modeled (with lot's of code copied as is)
+ * after the tevent debug wrapper functions
+ ********************************************************************/
+
+/*
+ this allows the user to choose their own debug function
+*/
+int wbcSetDebug(struct wb_context *wb_ctx,
+ void (*debug)(void *context,
+ enum wbcDebugLevel level,
+ const char *fmt,
+ va_list ap) PRINTF_ATTRIBUTE(3,0),
+ void *context)
+{
+ wb_ctx->debug_ops.debug = debug;
+ wb_ctx->debug_ops.context = context;
+ return 0;
+}
+
+/*
+ debug function for wbcSetDebugStderr
+*/
+static void wbcDebugStderr(void *private_data,
+ enum wbcDebugLevel level,
+ const char *fmt,
+ va_list ap) PRINTF_ATTRIBUTE(3,0);
+static void wbcDebugStderr(void *private_data,
+ enum wbcDebugLevel level,
+ const char *fmt, va_list ap)
+{
+ if (level <= WBC_DEBUG_WARNING) {
+ vfprintf(stderr, fmt, ap);
+ }
+}
+
+/*
+ convenience function to setup debug messages on stderr
+ messages of level WBC_DEBUG_WARNING and higher are printed
+*/
+int wbcSetDebugStderr(struct wb_context *wb_ctx)
+{
+ return wbcSetDebug(wb_ctx, wbcDebugStderr, wb_ctx);
+}
+
+/*
+ * log a message
+ *
+ * The default debug action is to ignore debugging messages.
+ * This is the most appropriate action for a library.
+ * Applications using the library must decide where to
+ * redirect debugging messages
+*/
+void wbcDebug(struct wb_context *wb_ctx, enum wbcDebugLevel level,
+ const char *fmt, ...)
+{
+ va_list ap;
+ if (!wb_ctx) {
+ return;
+ }
+ if (wb_ctx->debug_ops.debug == NULL) {
+ return;
+ }
+ va_start(ap, fmt);
+ wb_ctx->debug_ops.debug(wb_ctx->debug_ops.context, level, fmt, ap);
+ va_end(ap);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-26 15:11:32 +0000