#include "includes.h"
#include "winbindd.h"
+#include "../../nsswitch/libwbclient/wbc_async.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_WINBIND
{ WINBINDD_NUM_CMDS, NULL, "NONE" }
};
+struct winbindd_async_dispatch_table {
+ enum winbindd_cmd cmd;
+ const char *cmd_name;
+ struct tevent_req *(*send_req)(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct winbindd_request *request);
+ NTSTATUS (*recv_req)(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+ struct winbindd_response **presp);
+};
+
+static struct winbindd_async_dispatch_table async_nonpriv_table[] = {
+ { 0, NULL, NULL, NULL }
+};
+
+static void wb_request_done(struct tevent_req *req);
+
static void process_request(struct winbindd_cli_state *state)
{
struct winbindd_dispatch_table *table = dispatch_table;
+ struct winbindd_async_dispatch_table *atable;
ZERO_STRUCT(state->response);
return;
/* Remember who asked us. */
- state->pid = state->request.pid;
+ state->pid = state->request->pid;
/* Process command */
- for (table = dispatch_table; table->fn; table++) {
- if (state->request.cmd == table->cmd) {
- DEBUG(10,("process_request: request fn %s\n",
- table->winbindd_cmd_name ));
- table->fn(state);
+ for (atable = async_nonpriv_table; atable->send_req; atable += 1) {
+ if (state->request->cmd == atable->cmd) {
break;
}
}
- if (!table->fn) {
- DEBUG(10,("process_request: unknown request fn number %d\n",
- (int)state->request.cmd ));
- request_error(state);
- }
-}
-
-/*
- * A list of file descriptors being monitored by select in the main processing
- * loop. winbindd_fd_event->handler is called whenever the socket is readable/writable.
- */
-
-static struct winbindd_fd_event *fd_events = NULL;
-
-void add_fd_event(struct winbindd_fd_event *ev)
-{
- struct winbindd_fd_event *match;
-
- /* only add unique winbindd_fd_event structs */
-
- for (match=fd_events; match; match=match->next ) {
-#ifdef DEVELOPER
- SMB_ASSERT( match != ev );
-#else
- if ( match == ev )
- return;
-#endif
- }
-
- DLIST_ADD(fd_events, ev);
-}
-
-void remove_fd_event(struct winbindd_fd_event *ev)
-{
- DLIST_REMOVE(fd_events, ev);
-}
-
-/*
- * Handler for winbindd_fd_events to complete a read/write request, set up by
- * setup_async_read/setup_async_write.
- */
-
-static void rw_callback(struct winbindd_fd_event *event, int flags)
-{
- size_t todo;
- ssize_t done = 0;
+ if (atable->send_req != NULL) {
+ struct tevent_req *req;
- todo = event->length - event->done;
+ DEBUG(10, ("process_request: Handling async request %s\n",
+ atable->cmd_name));
- if (event->flags & EVENT_FD_WRITE) {
- SMB_ASSERT(flags == EVENT_FD_WRITE);
- done = sys_write(event->fd,
- &((char *)event->data)[event->done],
- todo);
-
- if (done <= 0) {
- event->flags = 0;
- event->finished(event->private_data, False);
+ req = atable->send_req(state->mem_ctx, winbind_event_context(),
+ state->request);
+ if (req == NULL) {
+ DEBUG(0, ("process_request: atable->send failed for "
+ "%s\n", atable->cmd_name));
+ request_error(state);
return;
}
+ tevent_req_set_callback(req, wb_request_done, state);
+ state->recv_fn = atable->recv_req;
+ return;
}
- if (event->flags & EVENT_FD_READ) {
- SMB_ASSERT(flags == EVENT_FD_READ);
- done = sys_read(event->fd, &((char *)event->data)[event->done],
- todo);
-
- if (done <= 0) {
- event->flags = 0;
- event->finished(event->private_data, False);
- return;
+ for (table = dispatch_table; table->fn; table++) {
+ if (state->request->cmd == table->cmd) {
+ DEBUG(10,("process_request: request fn %s\n",
+ table->winbindd_cmd_name ));
+ table->fn(state);
+ break;
}
}
- event->done += done;
-
- if (event->done == event->length) {
- event->flags = 0;
- event->finished(event->private_data, True);
+ if (!table->fn) {
+ DEBUG(10,("process_request: unknown request fn number %d\n",
+ (int)state->request->cmd ));
+ request_error(state);
}
}
-/*
- * Request an async read/write on a winbindd_fd_event structure. (*finished) is called
- * when the request is completed or an error had occurred.
- */
-
-void setup_async_read(struct winbindd_fd_event *event, void *data, size_t length,
- void (*finished)(void *private_data, bool success),
- void *private_data)
-{
- SMB_ASSERT(event->flags == 0);
- event->data = data;
- event->length = length;
- event->done = 0;
- event->handler = rw_callback;
- event->finished = finished;
- event->private_data = private_data;
- event->flags = EVENT_FD_READ;
-}
-
-void setup_async_write(struct winbindd_fd_event *event, void *data, size_t length,
- void (*finished)(void *private_data, bool success),
- void *private_data)
+static void wb_request_done(struct tevent_req *req)
{
- SMB_ASSERT(event->flags == 0);
- event->data = data;
- event->length = length;
- event->done = 0;
- event->handler = rw_callback;
- event->finished = finished;
- event->private_data = private_data;
- event->flags = EVENT_FD_WRITE;
+ struct winbindd_cli_state *state = tevent_req_callback_data(
+ req, struct winbindd_cli_state);
+ NTSTATUS status;
+ struct winbindd_response *response;
+
+ status = state->recv_fn(req, state->mem_ctx, &response);
+ TALLOC_FREE(req);
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(10, ("returning %s\n", nt_errstr(status)));
+ request_error(state);
+ }
+ state->response = *response;
+ state->response.result = WINBINDD_PENDING;
+ state->response.length = sizeof(struct winbindd_response);
+ request_ok(state);
}
/*
* to call request_finished which schedules sending the response.
*/
-static void request_len_recv(void *private_data, bool success);
-static void request_recv(void *private_data, bool success);
-static void request_main_recv(void *private_data, bool success);
static void request_finished(struct winbindd_cli_state *state);
-static void response_main_sent(void *private_data, bool success);
-static void response_extra_sent(void *private_data, bool success);
-static void response_extra_sent(void *private_data, bool success)
+static void winbind_client_request_read(struct tevent_req *req);
+static void winbind_client_response_written(struct tevent_req *req);
+
+static void request_finished(struct winbindd_cli_state *state)
{
- struct winbindd_cli_state *state =
- talloc_get_type_abort(private_data, struct winbindd_cli_state);
+ struct tevent_req *req;
- TALLOC_FREE(state->mem_ctx);
+ TALLOC_FREE(state->request);
- if (!success) {
- state->finished = True;
+ req = wb_resp_write_send(state, winbind_event_context(),
+ state->out_queue, state->sock,
+ &state->response);
+ if (req == NULL) {
+ state->finished = true;
return;
}
-
- setup_async_read(&state->fd_event, &state->request, sizeof(uint32),
- request_len_recv, state);
+ tevent_req_set_callback(req, winbind_client_response_written, state);
}
-static void response_main_sent(void *private_data, bool success)
+static void winbind_client_response_written(struct tevent_req *req)
{
- struct winbindd_cli_state *state =
- talloc_get_type_abort(private_data, struct winbindd_cli_state);
-
- if (!success) {
- state->finished = True;
+ struct winbindd_cli_state *state = tevent_req_callback_data(
+ req, struct winbindd_cli_state);
+ ssize_t ret;
+ int err;
+
+ ret = wb_resp_write_recv(req, &err);
+ TALLOC_FREE(req);
+ if (ret == -1) {
+ DEBUG(2, ("Could not write response to client: %s\n",
+ strerror(err)));
+ state->finished = true;
return;
}
- if (state->response.length == sizeof(state->response)) {
- TALLOC_FREE(state->mem_ctx);
+ TALLOC_FREE(state->mem_ctx);
- setup_async_read(&state->fd_event, &state->request,
- sizeof(uint32), request_len_recv, state);
+ req = wb_req_read_send(state, winbind_event_context(), state->sock,
+ WINBINDD_MAX_EXTRA_DATA);
+ if (req == NULL) {
+ state->finished = true;
return;
}
-
- setup_async_write(&state->fd_event, state->response.extra_data.data,
- state->response.length - sizeof(state->response),
- response_extra_sent, state);
-}
-
-static void request_finished(struct winbindd_cli_state *state)
-{
- /* Make sure request.extra_data is freed when finish processing a request */
- SAFE_FREE(state->request.extra_data.data);
- setup_async_write(&state->fd_event, &state->response,
- sizeof(state->response), response_main_sent, state);
+ tevent_req_set_callback(req, winbind_client_request_read, state);
}
void request_error(struct winbindd_cli_state *state)
request_finished(state);
}
-static void request_len_recv(void *private_data, bool success)
-{
- struct winbindd_cli_state *state =
- talloc_get_type_abort(private_data, struct winbindd_cli_state);
-
- if (!success) {
- state->finished = True;
- return;
- }
-
- if (*(uint32 *)(void *)(&state->request) != sizeof(state->request)) {
- DEBUG(0,("request_len_recv: Invalid request size received: %d (expected %u)\n",
- *(uint32_t *)(void *)(&state->request),
- (uint32_t)sizeof(state->request)));
- state->finished = True;
- return;
- }
-
- setup_async_read(&state->fd_event,
- (uint32 *)(void *)(&state->request)+1,
- sizeof(state->request) - sizeof(uint32),
- request_main_recv, state);
-}
-
-static void request_main_recv(void *private_data, bool success)
-{
- struct winbindd_cli_state *state =
- talloc_get_type_abort(private_data, struct winbindd_cli_state);
-
- if (!success) {
- state->finished = True;
- return;
- }
-
- if (state->request.extra_len == 0) {
- state->request.extra_data.data = NULL;
- request_recv(state, True);
- return;
- }
-
- if ((!state->privileged) &&
- (state->request.extra_len > WINBINDD_MAX_EXTRA_DATA)) {
- DEBUG(3, ("Got request with %d bytes extra data on "
- "unprivileged socket\n", (int)state->request.extra_len));
- state->request.extra_data.data = NULL;
- state->finished = True;
- return;
- }
-
- state->request.extra_data.data =
- SMB_MALLOC_ARRAY(char, state->request.extra_len + 1);
-
- if (state->request.extra_data.data == NULL) {
- DEBUG(0, ("malloc failed\n"));
- state->finished = True;
- return;
- }
-
- /* Ensure null termination */
- state->request.extra_data.data[state->request.extra_len] = '\0';
-
- setup_async_read(&state->fd_event, state->request.extra_data.data,
- state->request.extra_len, request_recv, state);
-}
-
-static void request_recv(void *private_data, bool success)
-{
- struct winbindd_cli_state *state =
- talloc_get_type_abort(private_data, struct winbindd_cli_state);
-
- if (!success) {
- state->finished = True;
- return;
- }
-
- process_request(state);
-}
-
/* Process a new connection by adding it to the client connection list */
static void new_connection(int listen_sock, bool privileged)
{
struct sockaddr_un sunaddr;
struct winbindd_cli_state *state;
+ struct tevent_req *req;
socklen_t len;
int sock;
state->sock = sock;
+ state->out_queue = tevent_queue_create(state, "winbind client reply");
+ if (state->out_queue == NULL) {
+ close(sock);
+ TALLOC_FREE(state);
+ return;
+ }
+
state->last_access = time(NULL);
state->privileged = privileged;
- state->fd_event.fd = state->sock;
- state->fd_event.flags = 0;
- add_fd_event(&state->fd_event);
-
- setup_async_read(&state->fd_event, &state->request, sizeof(uint32),
- request_len_recv, state);
+ req = wb_req_read_send(state, winbind_event_context(), state->sock,
+ WINBINDD_MAX_EXTRA_DATA);
+ if (req == NULL) {
+ TALLOC_FREE(state);
+ close(sock);
+ return;
+ }
+ tevent_req_set_callback(req, winbind_client_request_read, state);
/* Add to connection list */
winbindd_add_client(state);
}
+static void winbind_client_request_read(struct tevent_req *req)
+{
+ struct winbindd_cli_state *state = tevent_req_callback_data(
+ req, struct winbindd_cli_state);
+ ssize_t ret;
+ int err;
+
+ ret = wb_req_read_recv(req, state, &state->request, &err);
+ if (ret == -1) {
+ DEBUG(2, ("Could not read client request: %s\n",
+ strerror(err)));
+ state->finished = true;
+ return;
+ }
+ process_request(state);
+}
+
/* Remove a client connection from client connection list */
static void remove_client(struct winbindd_cli_state *state)
TALLOC_FREE(state->mem_ctx);
- remove_fd_event(&state->fd_event);
-
/* Remove from list and free */
winbindd_remove_client(state);
for (state = winbindd_client_list(); state; state = state->next) {
if (state->response.result != WINBINDD_PENDING &&
- state->fd_event.flags == EVENT_FD_READ &&
!state->getpwent_state && !state->getgrent_state) {
nidle++;
if (!last_access || state->last_access < last_access) {
static void process_loop(void)
{
- struct winbindd_fd_event *ev;
fd_set r_fds, w_fds;
int maxfd = 0, selret;
struct timeval timeout, ev_timeout;
timeout = timeval_min(&timeout, &ev_timeout);
}
- for (ev = fd_events; ev; ev = ev->next) {
- if (ev->flags & EVENT_FD_READ) {
- FD_SET(ev->fd, &r_fds);
- maxfd = MAX(ev->fd, maxfd);
- }
- if (ev->flags & EVENT_FD_WRITE) {
- FD_SET(ev->fd, &w_fds);
- maxfd = MAX(ev->fd, maxfd);
- }
- }
-
/* Call select */
selret = sys_select(maxfd + 1, &r_fds, &w_fds, NULL, &timeout);
run_events(winbind_event_context(), selret, &r_fds, &w_fds);
- ev = fd_events;
- while (ev != NULL) {
- struct winbindd_fd_event *next = ev->next;
- int flags = 0;
- if (FD_ISSET(ev->fd, &r_fds))
- flags |= EVENT_FD_READ;
- if (FD_ISSET(ev->fd, &w_fds))
- flags |= EVENT_FD_WRITE;
- if (flags)
- ev->handler(ev, flags);
- ev = next;
- }
-
return;
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git.samba.org / samba.git / blobdiff