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https://github.com/samba-team/samba.git
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2198058624
Winbind can't be allowed to connect to the local smbd.
(This used to be commit 0d617f639a
)
1185 lines
31 KiB
C
1185 lines
31 KiB
C
/*
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Unix SMB/CIFS implementation.
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Winbind child daemons
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Copyright (C) Andrew Tridgell 2002
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Copyright (C) Volker Lendecke 2004,2005
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* We fork a child per domain to be able to act non-blocking in the main
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* winbind daemon. A domain controller thousands of miles away being being
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* slow replying with a 10.000 user list should not hold up netlogon calls
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* that can be handled locally.
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*/
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#include "includes.h"
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#include "winbindd.h"
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#undef DBGC_CLASS
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#define DBGC_CLASS DBGC_WINBIND
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extern bool override_logfile;
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extern struct winbindd_methods cache_methods;
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/* Read some data from a client connection */
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static void child_read_request(struct winbindd_cli_state *state)
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{
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NTSTATUS status;
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/* Read data */
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status = read_data(state->sock, (char *)&state->request,
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sizeof(state->request));
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(3, ("child_read_request: read_data failed: %s\n",
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nt_errstr(status)));
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state->finished = True;
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return;
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}
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if (state->request.extra_len == 0) {
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state->request.extra_data.data = NULL;
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return;
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}
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DEBUG(10, ("Need to read %d extra bytes\n", (int)state->request.extra_len));
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state->request.extra_data.data =
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SMB_MALLOC_ARRAY(char, state->request.extra_len + 1);
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if (state->request.extra_data.data == NULL) {
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DEBUG(0, ("malloc failed\n"));
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state->finished = True;
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return;
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}
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/* Ensure null termination */
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state->request.extra_data.data[state->request.extra_len] = '\0';
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status= read_data(state->sock, state->request.extra_data.data,
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state->request.extra_len);
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if (!NT_STATUS_IS_OK(status)) {
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DEBUG(0, ("Could not read extra data: %s\n",
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nt_errstr(status)));
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state->finished = True;
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return;
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}
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}
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/*
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* Machinery for async requests sent to children. You set up a
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* winbindd_request, select a child to query, and issue a async_request
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* call. When the request is completed, the callback function you specified is
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* called back with the private pointer you gave to async_request.
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*/
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struct winbindd_async_request {
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struct winbindd_async_request *next, *prev;
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TALLOC_CTX *mem_ctx;
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struct winbindd_child *child;
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struct winbindd_request *request;
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struct winbindd_response *response;
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void (*continuation)(void *private_data, bool success);
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struct timed_event *reply_timeout_event;
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pid_t child_pid; /* pid of the child we're waiting on. Used to detect
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a restart of the child (child->pid != child_pid). */
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void *private_data;
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};
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static void async_main_request_sent(void *private_data, bool success);
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static void async_request_sent(void *private_data, bool success);
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static void async_reply_recv(void *private_data, bool success);
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static void schedule_async_request(struct winbindd_child *child);
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void async_request(TALLOC_CTX *mem_ctx, struct winbindd_child *child,
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struct winbindd_request *request,
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struct winbindd_response *response,
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void (*continuation)(void *private_data, bool success),
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void *private_data)
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{
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struct winbindd_async_request *state;
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SMB_ASSERT(continuation != NULL);
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state = TALLOC_P(mem_ctx, struct winbindd_async_request);
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if (state == NULL) {
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DEBUG(0, ("talloc failed\n"));
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continuation(private_data, False);
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return;
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}
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state->mem_ctx = mem_ctx;
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state->child = child;
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state->request = request;
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state->response = response;
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state->continuation = continuation;
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state->private_data = private_data;
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DLIST_ADD_END(child->requests, state, struct winbindd_async_request *);
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schedule_async_request(child);
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return;
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}
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static void async_main_request_sent(void *private_data, bool success)
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{
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struct winbindd_async_request *state =
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talloc_get_type_abort(private_data, struct winbindd_async_request);
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if (!success) {
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DEBUG(5, ("Could not send async request\n"));
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state->response->length = sizeof(struct winbindd_response);
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state->response->result = WINBINDD_ERROR;
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state->continuation(state->private_data, False);
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return;
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}
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if (state->request->extra_len == 0) {
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async_request_sent(private_data, True);
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return;
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}
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setup_async_write(&state->child->event, state->request->extra_data.data,
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state->request->extra_len,
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async_request_sent, state);
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}
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/****************************************************************
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Handler triggered if the child winbindd doesn't respond within
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a given timeout.
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****************************************************************/
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static void async_request_timeout_handler(struct event_context *ctx,
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struct timed_event *te,
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const struct timeval *now,
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void *private_data)
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{
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struct winbindd_async_request *state =
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talloc_get_type_abort(private_data, struct winbindd_async_request);
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DEBUG(0,("async_request_timeout_handler: child pid %u is not responding. "
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"Closing connection to it.\n",
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state->child_pid ));
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/* Deal with the reply - set to error. */
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async_reply_recv(private_data, False);
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}
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/**************************************************************
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Common function called on both async send and recv fail.
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Cleans up the child and schedules the next request.
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**************************************************************/
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static void async_request_fail(struct winbindd_async_request *state)
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{
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DLIST_REMOVE(state->child->requests, state);
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TALLOC_FREE(state->reply_timeout_event);
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SMB_ASSERT(state->child_pid != (pid_t)0);
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/* If not already reaped, send kill signal to child. */
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if (state->child->pid == state->child_pid) {
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kill(state->child_pid, SIGTERM);
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/*
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* Close the socket to the child.
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*/
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winbind_child_died(state->child_pid);
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}
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state->response->length = sizeof(struct winbindd_response);
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state->response->result = WINBINDD_ERROR;
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state->continuation(state->private_data, False);
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}
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static void async_request_sent(void *private_data_data, bool success)
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{
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struct winbindd_async_request *state =
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talloc_get_type_abort(private_data_data, struct winbindd_async_request);
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if (!success) {
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DEBUG(5, ("Could not send async request to child pid %u\n",
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(unsigned int)state->child_pid ));
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async_request_fail(state);
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return;
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}
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/* Request successfully sent to the child, setup the wait for reply */
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setup_async_read(&state->child->event,
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&state->response->result,
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sizeof(state->response->result),
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async_reply_recv, state);
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/*
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* Set up a timeout of 300 seconds for the response.
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* If we don't get it close the child socket and
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* report failure.
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*/
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state->reply_timeout_event = event_add_timed(winbind_event_context(),
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NULL,
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timeval_current_ofs(300,0),
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"async_request_timeout",
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async_request_timeout_handler,
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state);
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if (!state->reply_timeout_event) {
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smb_panic("async_request_sent: failed to add timeout handler.\n");
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}
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}
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static void async_reply_recv(void *private_data, bool success)
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{
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struct winbindd_async_request *state =
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talloc_get_type_abort(private_data, struct winbindd_async_request);
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struct winbindd_child *child = state->child;
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TALLOC_FREE(state->reply_timeout_event);
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state->response->length = sizeof(struct winbindd_response);
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if (!success) {
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DEBUG(5, ("Could not receive async reply from child pid %u\n",
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(unsigned int)state->child_pid ));
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cache_cleanup_response(state->child_pid);
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async_request_fail(state);
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return;
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}
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SMB_ASSERT(cache_retrieve_response(state->child_pid,
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state->response));
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cache_cleanup_response(state->child_pid);
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DLIST_REMOVE(child->requests, state);
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schedule_async_request(child);
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state->continuation(state->private_data, True);
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}
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static bool fork_domain_child(struct winbindd_child *child);
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static void schedule_async_request(struct winbindd_child *child)
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{
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struct winbindd_async_request *request = child->requests;
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if (request == NULL) {
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return;
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}
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if (child->event.flags != 0) {
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return; /* Busy */
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}
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if ((child->pid == 0) && (!fork_domain_child(child))) {
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/* Cancel all outstanding requests */
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while (request != NULL) {
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/* request might be free'd in the continuation */
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struct winbindd_async_request *next = request->next;
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request->continuation(request->private_data, False);
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request = next;
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}
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return;
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}
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/* Now we know who we're sending to - remember the pid. */
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request->child_pid = child->pid;
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setup_async_write(&child->event, request->request,
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sizeof(*request->request),
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async_main_request_sent, request);
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return;
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}
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struct domain_request_state {
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TALLOC_CTX *mem_ctx;
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struct winbindd_domain *domain;
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struct winbindd_request *request;
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struct winbindd_response *response;
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void (*continuation)(void *private_data_data, bool success);
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void *private_data_data;
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};
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static void domain_init_recv(void *private_data_data, bool success);
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void async_domain_request(TALLOC_CTX *mem_ctx,
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struct winbindd_domain *domain,
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struct winbindd_request *request,
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struct winbindd_response *response,
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void (*continuation)(void *private_data_data, bool success),
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void *private_data_data)
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{
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struct domain_request_state *state;
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if (domain->initialized) {
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async_request(mem_ctx, &domain->child, request, response,
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continuation, private_data_data);
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return;
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}
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state = TALLOC_P(mem_ctx, struct domain_request_state);
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if (state == NULL) {
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DEBUG(0, ("talloc failed\n"));
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continuation(private_data_data, False);
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return;
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}
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state->mem_ctx = mem_ctx;
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state->domain = domain;
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state->request = request;
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state->response = response;
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state->continuation = continuation;
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state->private_data_data = private_data_data;
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init_child_connection(domain, domain_init_recv, state);
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}
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static void domain_init_recv(void *private_data_data, bool success)
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{
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struct domain_request_state *state =
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talloc_get_type_abort(private_data_data, struct domain_request_state);
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if (!success) {
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DEBUG(5, ("Domain init returned an error\n"));
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state->continuation(state->private_data_data, False);
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return;
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}
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async_request(state->mem_ctx, &state->domain->child,
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state->request, state->response,
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state->continuation, state->private_data_data);
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}
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static void recvfrom_child(void *private_data_data, bool success)
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{
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struct winbindd_cli_state *state =
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talloc_get_type_abort(private_data_data, struct winbindd_cli_state);
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enum winbindd_result result = state->response.result;
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/* This is an optimization: The child has written directly to the
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* response buffer. The request itself is still in pending state,
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* state that in the result code. */
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state->response.result = WINBINDD_PENDING;
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if ((!success) || (result != WINBINDD_OK)) {
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request_error(state);
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return;
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}
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request_ok(state);
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}
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void sendto_child(struct winbindd_cli_state *state,
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struct winbindd_child *child)
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{
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async_request(state->mem_ctx, child, &state->request,
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&state->response, recvfrom_child, state);
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}
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void sendto_domain(struct winbindd_cli_state *state,
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struct winbindd_domain *domain)
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{
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async_domain_request(state->mem_ctx, domain,
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&state->request, &state->response,
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recvfrom_child, state);
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}
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static void child_process_request(struct winbindd_child *child,
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struct winbindd_cli_state *state)
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{
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struct winbindd_domain *domain = child->domain;
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const struct winbindd_child_dispatch_table *table = child->table;
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/* Free response data - we may be interrupted and receive another
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command before being able to send this data off. */
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state->response.result = WINBINDD_ERROR;
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state->response.length = sizeof(struct winbindd_response);
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/* as all requests in the child are sync, we can use talloc_tos() */
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state->mem_ctx = talloc_tos();
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/* Process command */
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for (; table->name; table++) {
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if (state->request.cmd == table->struct_cmd) {
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DEBUG(10,("child_process_request: request fn %s\n",
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table->name));
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state->response.result = table->struct_fn(domain, state);
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return;
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}
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}
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DEBUG(1 ,("child_process_request: unknown request fn number %d\n",
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(int)state->request.cmd));
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state->response.result = WINBINDD_ERROR;
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}
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void setup_child(struct winbindd_child *child,
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const struct winbindd_child_dispatch_table *table,
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const char *logprefix,
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const char *logname)
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{
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if (logprefix && logname) {
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if (asprintf(&child->logfilename, "%s/%s-%s",
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get_dyn_LOGFILEBASE(), logprefix, logname) < 0) {
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smb_panic("Internal error: asprintf failed");
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}
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} else {
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smb_panic("Internal error: logprefix == NULL && "
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"logname == NULL");
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}
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child->domain = NULL;
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child->table = table;
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}
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struct winbindd_child *children = NULL;
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void winbind_child_died(pid_t pid)
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{
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struct winbindd_child *child;
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for (child = children; child != NULL; child = child->next) {
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if (child->pid == pid) {
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break;
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}
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}
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if (child == NULL) {
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DEBUG(5, ("Already reaped child %u died\n", (unsigned int)pid));
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return;
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}
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remove_fd_event(&child->event);
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close(child->event.fd);
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child->event.fd = 0;
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child->event.flags = 0;
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child->pid = 0;
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schedule_async_request(child);
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}
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/* Ensure any negative cache entries with the netbios or realm names are removed. */
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void winbindd_flush_negative_conn_cache(struct winbindd_domain *domain)
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{
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flush_negative_conn_cache_for_domain(domain->name);
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if (*domain->alt_name) {
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flush_negative_conn_cache_for_domain(domain->alt_name);
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}
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}
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/* Set our domains as offline and forward the offline message to our children. */
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void winbind_msg_offline(struct messaging_context *msg_ctx,
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void *private_data,
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uint32_t msg_type,
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struct server_id server_id,
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DATA_BLOB *data)
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{
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struct winbindd_child *child;
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struct winbindd_domain *domain;
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DEBUG(10,("winbind_msg_offline: got offline message.\n"));
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if (!lp_winbind_offline_logon()) {
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DEBUG(10,("winbind_msg_offline: rejecting offline message.\n"));
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return;
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}
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/* Set our global state as offline. */
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if (!set_global_winbindd_state_offline()) {
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DEBUG(10,("winbind_msg_offline: offline request failed.\n"));
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return;
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}
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/* Set all our domains as offline. */
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for (domain = domain_list(); domain; domain = domain->next) {
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if (domain->internal) {
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continue;
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}
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DEBUG(5,("winbind_msg_offline: marking %s offline.\n", domain->name));
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set_domain_offline(domain);
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}
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for (child = children; child != NULL; child = child->next) {
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/* Don't send message to internal childs. We've already
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done so above. */
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if (!child->domain || winbindd_internal_child(child)) {
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continue;
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}
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/* Or internal domains (this should not be possible....) */
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if (child->domain->internal) {
|
|
continue;
|
|
}
|
|
|
|
/* Each winbindd child should only process requests for one domain - make sure
|
|
we only set it online / offline for that domain. */
|
|
|
|
DEBUG(10,("winbind_msg_offline: sending message to pid %u for domain %s.\n",
|
|
(unsigned int)child->pid, domain->name ));
|
|
|
|
messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
|
|
MSG_WINBIND_OFFLINE,
|
|
(uint8 *)child->domain->name,
|
|
strlen(child->domain->name)+1);
|
|
}
|
|
}
|
|
|
|
/* Set our domains as online and forward the online message to our children. */
|
|
|
|
void winbind_msg_online(struct messaging_context *msg_ctx,
|
|
void *private_data,
|
|
uint32_t msg_type,
|
|
struct server_id server_id,
|
|
DATA_BLOB *data)
|
|
{
|
|
struct winbindd_child *child;
|
|
struct winbindd_domain *domain;
|
|
|
|
DEBUG(10,("winbind_msg_online: got online message.\n"));
|
|
|
|
if (!lp_winbind_offline_logon()) {
|
|
DEBUG(10,("winbind_msg_online: rejecting online message.\n"));
|
|
return;
|
|
}
|
|
|
|
/* Set our global state as online. */
|
|
set_global_winbindd_state_online();
|
|
|
|
smb_nscd_flush_user_cache();
|
|
smb_nscd_flush_group_cache();
|
|
|
|
/* Set all our domains as online. */
|
|
for (domain = domain_list(); domain; domain = domain->next) {
|
|
if (domain->internal) {
|
|
continue;
|
|
}
|
|
DEBUG(5,("winbind_msg_online: requesting %s to go online.\n", domain->name));
|
|
|
|
winbindd_flush_negative_conn_cache(domain);
|
|
set_domain_online_request(domain);
|
|
|
|
/* Send an online message to the idmap child when our
|
|
primary domain comes back online */
|
|
|
|
if ( domain->primary ) {
|
|
struct winbindd_child *idmap = idmap_child();
|
|
|
|
if ( idmap->pid != 0 ) {
|
|
messaging_send_buf(msg_ctx,
|
|
pid_to_procid(idmap->pid),
|
|
MSG_WINBIND_ONLINE,
|
|
(uint8 *)domain->name,
|
|
strlen(domain->name)+1);
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
for (child = children; child != NULL; child = child->next) {
|
|
/* Don't send message to internal childs. */
|
|
if (!child->domain || winbindd_internal_child(child)) {
|
|
continue;
|
|
}
|
|
|
|
/* Or internal domains (this should not be possible....) */
|
|
if (child->domain->internal) {
|
|
continue;
|
|
}
|
|
|
|
/* Each winbindd child should only process requests for one domain - make sure
|
|
we only set it online / offline for that domain. */
|
|
|
|
DEBUG(10,("winbind_msg_online: sending message to pid %u for domain %s.\n",
|
|
(unsigned int)child->pid, child->domain->name ));
|
|
|
|
messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
|
|
MSG_WINBIND_ONLINE,
|
|
(uint8 *)child->domain->name,
|
|
strlen(child->domain->name)+1);
|
|
}
|
|
}
|
|
|
|
/* Forward the online/offline messages to our children. */
|
|
void winbind_msg_onlinestatus(struct messaging_context *msg_ctx,
|
|
void *private_data,
|
|
uint32_t msg_type,
|
|
struct server_id server_id,
|
|
DATA_BLOB *data)
|
|
{
|
|
struct winbindd_child *child;
|
|
|
|
DEBUG(10,("winbind_msg_onlinestatus: got onlinestatus message.\n"));
|
|
|
|
for (child = children; child != NULL; child = child->next) {
|
|
if (child->domain && child->domain->primary) {
|
|
DEBUG(10,("winbind_msg_onlinestatus: "
|
|
"sending message to pid %u of primary domain.\n",
|
|
(unsigned int)child->pid));
|
|
messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
|
|
MSG_WINBIND_ONLINESTATUS,
|
|
(uint8 *)data->data,
|
|
data->length);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void winbind_msg_dump_event_list(struct messaging_context *msg_ctx,
|
|
void *private_data,
|
|
uint32_t msg_type,
|
|
struct server_id server_id,
|
|
DATA_BLOB *data)
|
|
{
|
|
struct winbindd_child *child;
|
|
|
|
DEBUG(10,("winbind_msg_dump_event_list received\n"));
|
|
|
|
dump_event_list(winbind_event_context());
|
|
|
|
for (child = children; child != NULL; child = child->next) {
|
|
|
|
DEBUG(10,("winbind_msg_dump_event_list: sending message to pid %u\n",
|
|
(unsigned int)child->pid));
|
|
|
|
messaging_send_buf(msg_ctx, pid_to_procid(child->pid),
|
|
MSG_DUMP_EVENT_LIST,
|
|
NULL, 0);
|
|
}
|
|
|
|
}
|
|
|
|
void winbind_msg_dump_domain_list(struct messaging_context *msg_ctx,
|
|
void *private_data,
|
|
uint32_t msg_type,
|
|
struct server_id server_id,
|
|
DATA_BLOB *data)
|
|
{
|
|
TALLOC_CTX *mem_ctx;
|
|
const char *message = NULL;
|
|
struct server_id *sender = NULL;
|
|
const char *domain = NULL;
|
|
char *s = NULL;
|
|
NTSTATUS status;
|
|
struct winbindd_domain *dom = NULL;
|
|
|
|
DEBUG(5,("winbind_msg_dump_domain_list received.\n"));
|
|
|
|
if (!data || !data->data) {
|
|
return;
|
|
}
|
|
|
|
if (data->length < sizeof(struct server_id)) {
|
|
return;
|
|
}
|
|
|
|
mem_ctx = talloc_init("winbind_msg_dump_domain_list");
|
|
if (!mem_ctx) {
|
|
return;
|
|
}
|
|
|
|
sender = (struct server_id *)data->data;
|
|
if (data->length > sizeof(struct server_id)) {
|
|
domain = (const char *)data->data+sizeof(struct server_id);
|
|
}
|
|
|
|
if (domain) {
|
|
|
|
DEBUG(5,("winbind_msg_dump_domain_list for domain: %s\n",
|
|
domain));
|
|
|
|
message = NDR_PRINT_STRUCT_STRING(mem_ctx, winbindd_domain,
|
|
find_domain_from_name_noinit(domain));
|
|
if (!message) {
|
|
talloc_destroy(mem_ctx);
|
|
return;
|
|
}
|
|
|
|
messaging_send_buf(msg_ctx, *sender,
|
|
MSG_WINBIND_DUMP_DOMAIN_LIST,
|
|
(uint8_t *)message, strlen(message) + 1);
|
|
|
|
talloc_destroy(mem_ctx);
|
|
|
|
return;
|
|
}
|
|
|
|
DEBUG(5,("winbind_msg_dump_domain_list all domains\n"));
|
|
|
|
for (dom = domain_list(); dom; dom=dom->next) {
|
|
message = NDR_PRINT_STRUCT_STRING(mem_ctx, winbindd_domain, dom);
|
|
if (!message) {
|
|
talloc_destroy(mem_ctx);
|
|
return;
|
|
}
|
|
|
|
s = talloc_asprintf_append(s, "%s\n", message);
|
|
if (!s) {
|
|
talloc_destroy(mem_ctx);
|
|
return;
|
|
}
|
|
}
|
|
|
|
status = messaging_send_buf(msg_ctx, *sender,
|
|
MSG_WINBIND_DUMP_DOMAIN_LIST,
|
|
(uint8_t *)s, strlen(s) + 1);
|
|
if (!NT_STATUS_IS_OK(status)) {
|
|
DEBUG(0,("failed to send message: %s\n",
|
|
nt_errstr(status)));
|
|
}
|
|
|
|
talloc_destroy(mem_ctx);
|
|
}
|
|
|
|
static void account_lockout_policy_handler(struct event_context *ctx,
|
|
struct timed_event *te,
|
|
const struct timeval *now,
|
|
void *private_data)
|
|
{
|
|
struct winbindd_child *child =
|
|
(struct winbindd_child *)private_data;
|
|
TALLOC_CTX *mem_ctx = NULL;
|
|
struct winbindd_methods *methods;
|
|
struct samr_DomInfo12 lockout_policy;
|
|
NTSTATUS result;
|
|
|
|
DEBUG(10,("account_lockout_policy_handler called\n"));
|
|
|
|
TALLOC_FREE(child->lockout_policy_event);
|
|
|
|
if ( !winbindd_can_contact_domain( child->domain ) ) {
|
|
DEBUG(10,("account_lockout_policy_handler: Removing myself since I "
|
|
"do not have an incoming trust to domain %s\n",
|
|
child->domain->name));
|
|
|
|
return;
|
|
}
|
|
|
|
methods = child->domain->methods;
|
|
|
|
mem_ctx = talloc_init("account_lockout_policy_handler ctx");
|
|
if (!mem_ctx) {
|
|
result = NT_STATUS_NO_MEMORY;
|
|
} else {
|
|
result = methods->lockout_policy(child->domain, mem_ctx, &lockout_policy);
|
|
}
|
|
TALLOC_FREE(mem_ctx);
|
|
|
|
if (!NT_STATUS_IS_OK(result)) {
|
|
DEBUG(10,("account_lockout_policy_handler: lockout_policy failed error %s\n",
|
|
nt_errstr(result)));
|
|
}
|
|
|
|
child->lockout_policy_event = event_add_timed(winbind_event_context(), NULL,
|
|
timeval_current_ofs(3600, 0),
|
|
"account_lockout_policy_handler",
|
|
account_lockout_policy_handler,
|
|
child);
|
|
}
|
|
|
|
/* Deal with a request to go offline. */
|
|
|
|
static void child_msg_offline(struct messaging_context *msg,
|
|
void *private_data,
|
|
uint32_t msg_type,
|
|
struct server_id server_id,
|
|
DATA_BLOB *data)
|
|
{
|
|
struct winbindd_domain *domain;
|
|
const char *domainname = (const char *)data->data;
|
|
|
|
if (data->data == NULL || data->length == 0) {
|
|
return;
|
|
}
|
|
|
|
DEBUG(5,("child_msg_offline received for domain %s.\n", domainname));
|
|
|
|
if (!lp_winbind_offline_logon()) {
|
|
DEBUG(10,("child_msg_offline: rejecting offline message.\n"));
|
|
return;
|
|
}
|
|
|
|
/* Mark the requested domain offline. */
|
|
|
|
for (domain = domain_list(); domain; domain = domain->next) {
|
|
if (domain->internal) {
|
|
continue;
|
|
}
|
|
if (strequal(domain->name, domainname)) {
|
|
DEBUG(5,("child_msg_offline: marking %s offline.\n", domain->name));
|
|
set_domain_offline(domain);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Deal with a request to go online. */
|
|
|
|
static void child_msg_online(struct messaging_context *msg,
|
|
void *private_data,
|
|
uint32_t msg_type,
|
|
struct server_id server_id,
|
|
DATA_BLOB *data)
|
|
{
|
|
struct winbindd_domain *domain;
|
|
const char *domainname = (const char *)data->data;
|
|
|
|
if (data->data == NULL || data->length == 0) {
|
|
return;
|
|
}
|
|
|
|
DEBUG(5,("child_msg_online received for domain %s.\n", domainname));
|
|
|
|
if (!lp_winbind_offline_logon()) {
|
|
DEBUG(10,("child_msg_online: rejecting online message.\n"));
|
|
return;
|
|
}
|
|
|
|
/* Set our global state as online. */
|
|
set_global_winbindd_state_online();
|
|
|
|
/* Try and mark everything online - delete any negative cache entries
|
|
to force a reconnect now. */
|
|
|
|
for (domain = domain_list(); domain; domain = domain->next) {
|
|
if (domain->internal) {
|
|
continue;
|
|
}
|
|
if (strequal(domain->name, domainname)) {
|
|
DEBUG(5,("child_msg_online: requesting %s to go online.\n", domain->name));
|
|
winbindd_flush_negative_conn_cache(domain);
|
|
set_domain_online_request(domain);
|
|
}
|
|
}
|
|
}
|
|
|
|
static const char *collect_onlinestatus(TALLOC_CTX *mem_ctx)
|
|
{
|
|
struct winbindd_domain *domain;
|
|
char *buf = NULL;
|
|
|
|
if ((buf = talloc_asprintf(mem_ctx, "global:%s ",
|
|
get_global_winbindd_state_offline() ?
|
|
"Offline":"Online")) == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
for (domain = domain_list(); domain; domain = domain->next) {
|
|
if ((buf = talloc_asprintf_append_buffer(buf, "%s:%s ",
|
|
domain->name,
|
|
domain->online ?
|
|
"Online":"Offline")) == NULL) {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
buf = talloc_asprintf_append_buffer(buf, "\n");
|
|
|
|
DEBUG(5,("collect_onlinestatus: %s", buf));
|
|
|
|
return buf;
|
|
}
|
|
|
|
static void child_msg_onlinestatus(struct messaging_context *msg_ctx,
|
|
void *private_data,
|
|
uint32_t msg_type,
|
|
struct server_id server_id,
|
|
DATA_BLOB *data)
|
|
{
|
|
TALLOC_CTX *mem_ctx;
|
|
const char *message;
|
|
struct server_id *sender;
|
|
|
|
DEBUG(5,("winbind_msg_onlinestatus received.\n"));
|
|
|
|
if (!data->data) {
|
|
return;
|
|
}
|
|
|
|
sender = (struct server_id *)data->data;
|
|
|
|
mem_ctx = talloc_init("winbind_msg_onlinestatus");
|
|
if (mem_ctx == NULL) {
|
|
return;
|
|
}
|
|
|
|
message = collect_onlinestatus(mem_ctx);
|
|
if (message == NULL) {
|
|
talloc_destroy(mem_ctx);
|
|
return;
|
|
}
|
|
|
|
messaging_send_buf(msg_ctx, *sender, MSG_WINBIND_ONLINESTATUS,
|
|
(uint8 *)message, strlen(message) + 1);
|
|
|
|
talloc_destroy(mem_ctx);
|
|
}
|
|
|
|
static void child_msg_dump_event_list(struct messaging_context *msg,
|
|
void *private_data,
|
|
uint32_t msg_type,
|
|
struct server_id server_id,
|
|
DATA_BLOB *data)
|
|
{
|
|
DEBUG(5,("child_msg_dump_event_list received\n"));
|
|
|
|
dump_event_list(winbind_event_context());
|
|
}
|
|
|
|
|
|
static bool fork_domain_child(struct winbindd_child *child)
|
|
{
|
|
int fdpair[2];
|
|
struct winbindd_cli_state state;
|
|
struct winbindd_domain *domain;
|
|
|
|
if (child->domain) {
|
|
DEBUG(10, ("fork_domain_child called for domain '%s'\n",
|
|
child->domain->name));
|
|
} else {
|
|
DEBUG(10, ("fork_domain_child called without domain.\n"));
|
|
}
|
|
|
|
if (socketpair(AF_UNIX, SOCK_STREAM, 0, fdpair) != 0) {
|
|
DEBUG(0, ("Could not open child pipe: %s\n",
|
|
strerror(errno)));
|
|
return False;
|
|
}
|
|
|
|
ZERO_STRUCT(state);
|
|
state.pid = sys_getpid();
|
|
|
|
/* Stop zombies */
|
|
CatchChild();
|
|
|
|
child->pid = sys_fork();
|
|
|
|
if (child->pid == -1) {
|
|
DEBUG(0, ("Could not fork: %s\n", strerror(errno)));
|
|
return False;
|
|
}
|
|
|
|
if (child->pid != 0) {
|
|
/* Parent */
|
|
close(fdpair[0]);
|
|
child->next = child->prev = NULL;
|
|
DLIST_ADD(children, child);
|
|
child->event.fd = fdpair[1];
|
|
child->event.flags = 0;
|
|
child->requests = NULL;
|
|
add_fd_event(&child->event);
|
|
return True;
|
|
}
|
|
|
|
/* Child */
|
|
|
|
state.sock = fdpair[0];
|
|
close(fdpair[1]);
|
|
|
|
/* tdb needs special fork handling */
|
|
if (tdb_reopen_all(1) == -1) {
|
|
DEBUG(0,("tdb_reopen_all failed.\n"));
|
|
_exit(0);
|
|
}
|
|
|
|
close_conns_after_fork();
|
|
|
|
if (!override_logfile) {
|
|
lp_set_logfile(child->logfilename);
|
|
reopen_logs();
|
|
}
|
|
|
|
/*
|
|
* For clustering, we need to re-init our ctdbd connection after the
|
|
* fork
|
|
*/
|
|
if (!NT_STATUS_IS_OK(messaging_reinit(winbind_messaging_context())))
|
|
exit(1);
|
|
|
|
/* Don't handle the same messages as our parent. */
|
|
messaging_deregister(winbind_messaging_context(),
|
|
MSG_SMB_CONF_UPDATED, NULL);
|
|
messaging_deregister(winbind_messaging_context(),
|
|
MSG_SHUTDOWN, NULL);
|
|
messaging_deregister(winbind_messaging_context(),
|
|
MSG_WINBIND_OFFLINE, NULL);
|
|
messaging_deregister(winbind_messaging_context(),
|
|
MSG_WINBIND_ONLINE, NULL);
|
|
messaging_deregister(winbind_messaging_context(),
|
|
MSG_WINBIND_ONLINESTATUS, NULL);
|
|
messaging_deregister(winbind_messaging_context(),
|
|
MSG_DUMP_EVENT_LIST, NULL);
|
|
messaging_deregister(winbind_messaging_context(),
|
|
MSG_WINBIND_DUMP_DOMAIN_LIST, NULL);
|
|
|
|
/* Handle online/offline messages. */
|
|
messaging_register(winbind_messaging_context(), NULL,
|
|
MSG_WINBIND_OFFLINE, child_msg_offline);
|
|
messaging_register(winbind_messaging_context(), NULL,
|
|
MSG_WINBIND_ONLINE, child_msg_online);
|
|
messaging_register(winbind_messaging_context(), NULL,
|
|
MSG_WINBIND_ONLINESTATUS, child_msg_onlinestatus);
|
|
messaging_register(winbind_messaging_context(), NULL,
|
|
MSG_DUMP_EVENT_LIST, child_msg_dump_event_list);
|
|
|
|
if ( child->domain ) {
|
|
child->domain->startup = True;
|
|
child->domain->startup_time = time(NULL);
|
|
}
|
|
|
|
/* Ensure we have no pending check_online events other
|
|
than one for this domain. */
|
|
|
|
for (domain = domain_list(); domain; domain = domain->next) {
|
|
if (domain != child->domain) {
|
|
TALLOC_FREE(domain->check_online_event);
|
|
}
|
|
}
|
|
|
|
/* Ensure we're not handling an event inherited from
|
|
our parent. */
|
|
|
|
cancel_named_event(winbind_event_context(),
|
|
"krb5_ticket_refresh_handler");
|
|
|
|
/* We might be in the idmap child...*/
|
|
if (child->domain && !(child->domain->internal) &&
|
|
lp_winbind_offline_logon()) {
|
|
|
|
set_domain_online_request(child->domain);
|
|
|
|
child->lockout_policy_event = event_add_timed(
|
|
winbind_event_context(), NULL, timeval_zero(),
|
|
"account_lockout_policy_handler",
|
|
account_lockout_policy_handler,
|
|
child);
|
|
}
|
|
|
|
/* Special case for Winbindd on a Samba DC,
|
|
* We want to make sure the child can connect to smbd
|
|
* but not the main daemon */
|
|
|
|
if (child->domain && child->domain->internal && IS_DC) {
|
|
child->domain->methods = &cache_methods;
|
|
child->domain->online = False;
|
|
}
|
|
|
|
while (1) {
|
|
|
|
int ret;
|
|
fd_set read_fds;
|
|
struct timeval t;
|
|
struct timeval *tp;
|
|
struct timeval now;
|
|
TALLOC_CTX *frame = talloc_stackframe();
|
|
|
|
run_events(winbind_event_context(), 0, NULL, NULL);
|
|
|
|
GetTimeOfDay(&now);
|
|
|
|
if (child->domain && child->domain->startup &&
|
|
(now.tv_sec > child->domain->startup_time + 30)) {
|
|
/* No longer in "startup" mode. */
|
|
DEBUG(10,("fork_domain_child: domain %s no longer in 'startup' mode.\n",
|
|
child->domain->name ));
|
|
child->domain->startup = False;
|
|
}
|
|
|
|
tp = get_timed_events_timeout(winbind_event_context(), &t);
|
|
if (tp) {
|
|
DEBUG(11,("select will use timeout of %u.%u seconds\n",
|
|
(unsigned int)tp->tv_sec, (unsigned int)tp->tv_usec ));
|
|
}
|
|
|
|
/* Handle messages */
|
|
|
|
message_dispatch(winbind_messaging_context());
|
|
|
|
FD_ZERO(&read_fds);
|
|
FD_SET(state.sock, &read_fds);
|
|
|
|
ret = sys_select(state.sock + 1, &read_fds, NULL, NULL, tp);
|
|
|
|
if (ret == 0) {
|
|
DEBUG(11,("nothing is ready yet, continue\n"));
|
|
TALLOC_FREE(frame);
|
|
continue;
|
|
}
|
|
|
|
if (ret == -1 && errno == EINTR) {
|
|
/* We got a signal - continue. */
|
|
TALLOC_FREE(frame);
|
|
continue;
|
|
}
|
|
|
|
if (ret == -1 && errno != EINTR) {
|
|
DEBUG(0,("select error occured\n"));
|
|
TALLOC_FREE(frame);
|
|
perror("select");
|
|
return False;
|
|
}
|
|
|
|
/* fetch a request from the main daemon */
|
|
child_read_request(&state);
|
|
|
|
if (state.finished) {
|
|
/* we lost contact with our parent */
|
|
exit(0);
|
|
}
|
|
|
|
DEBUG(4,("child daemon request %d\n", (int)state.request.cmd));
|
|
|
|
ZERO_STRUCT(state.response);
|
|
state.request.null_term = '\0';
|
|
child_process_request(child, &state);
|
|
|
|
SAFE_FREE(state.request.extra_data.data);
|
|
|
|
cache_store_response(sys_getpid(), &state.response);
|
|
|
|
SAFE_FREE(state.response.extra_data.data);
|
|
|
|
/* We just send the result code back, the result
|
|
* structure needs to be fetched via the
|
|
* winbindd_cache. Hmm. That needs fixing... */
|
|
|
|
if (write_data(state.sock,
|
|
(const char *)&state.response.result,
|
|
sizeof(state.response.result)) !=
|
|
sizeof(state.response.result)) {
|
|
DEBUG(0, ("Could not write result\n"));
|
|
exit(1);
|
|
}
|
|
TALLOC_FREE(frame);
|
|
}
|
|
}
|