#include "includes.h"
#include "winbindd.h"
#include "../../nsswitch/libwbclient/wbc_async.h"
+#include "librpc/gen_ndr/messaging.h"
#undef DBGC_CLASS
#define DBGC_CLASS DBGC_WINBIND
/* Read some data from a client connection */
-static void child_read_request(struct winbindd_cli_state *state)
+static NTSTATUS child_read_request(struct winbindd_cli_state *state)
{
NTSTATUS status;
if (!NT_STATUS_IS_OK(status)) {
DEBUG(3, ("child_read_request: read_data failed: %s\n",
nt_errstr(status)));
- state->finished = True;
- return;
+ return status;
}
if (state->request->extra_len == 0) {
state->request->extra_data.data = NULL;
- return;
+ return NT_STATUS_OK;
}
DEBUG(10, ("Need to read %d extra bytes\n", (int)state->request->extra_len));
if (state->request->extra_data.data == NULL) {
DEBUG(0, ("malloc failed\n"));
- state->finished = True;
- return;
+ return NT_STATUS_NO_MEMORY;
}
/* Ensure null termination */
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Could not read extra data: %s\n",
nt_errstr(status)));
- state->finished = True;
- return;
}
+ return status;
}
/*
if (tevent_req_is_unix_error(req, err)) {
return -1;
}
- if (state->response->result != WINBINDD_OK) {
- *err = EIO; /* EIO doesn't fit, but what would be better? */
- return -1;
- }
*presponse = talloc_move(mem_ctx, &state->response);
return 0;
}
return 0;
}
-/*
- * Machinery for async requests sent to children. You set up a
- * winbindd_request, select a child to query, and issue a async_request
- * call. When the request is completed, the callback function you specified is
- * called back with the private pointer you gave to async_request.
- */
-
-struct winbindd_async_request {
- struct winbindd_async_request *next, *prev;
- TALLOC_CTX *mem_ctx;
- struct winbindd_child *child;
- struct winbindd_response *response;
- void (*continuation)(void *private_data, bool success);
- struct timed_event *reply_timeout_event;
- pid_t child_pid; /* pid of the child we're waiting on. Used to detect
- a restart of the child (child->pid != child_pid). */
- void *private_data;
-};
-
-static bool fork_domain_child(struct winbindd_child *child);
-static void async_request_done(struct tevent_req *req);
-
-void async_request(TALLOC_CTX *mem_ctx, struct winbindd_child *child,
- struct winbindd_request *request,
- struct winbindd_response *response,
- void (*continuation)(void *private_data, bool success),
- void *private_data)
-{
- struct winbindd_async_request *state;
- struct tevent_req *req;
-
- DEBUG(10, ("Sending request to child pid %d (domain=%s)\n",
- (int)child->pid,
- (child->domain != NULL) ? child->domain->name : "''"));
-
- state = talloc(mem_ctx, struct winbindd_async_request);
- if (state == NULL) {
- DEBUG(0, ("talloc failed\n"));
- continuation(private_data, False);
- return;
- }
-
- state->mem_ctx = mem_ctx;
- state->child = child;
- state->reply_timeout_event = NULL;
- state->response = response;
- state->continuation = continuation;
- state->private_data = private_data;
-
- request->pid = child->pid;
-
- req = wb_child_request_send(state, winbind_event_context(),
- child, request);
- if (req == NULL) {
- DEBUG(0, ("wb_child_request_send failed\n"));
- continuation(private_data, false);
- return;
- }
- tevent_req_set_callback(req, async_request_done, state);
-}
-
-static void async_request_done(struct tevent_req *req)
-{
- struct winbindd_async_request *state = tevent_req_callback_data(
- req, struct winbindd_async_request);
- struct winbindd_response *response;
- int ret, err;
-
- ret = wb_child_request_recv(req, state, &response, &err);
- TALLOC_FREE(req);
- if (ret == -1) {
- DEBUG(2, ("wb_child_request_recv failed: %s\n",
- strerror(err)));
- state->continuation(state->private_data, false);
- return;
- }
- *state->response = *response;
- state->continuation(state->private_data, true);
-}
-
-struct domain_request_state {
- TALLOC_CTX *mem_ctx;
- struct winbindd_domain *domain;
- struct winbindd_request *request;
- struct winbindd_response *response;
- void (*continuation)(void *private_data_data, bool success);
- void *private_data_data;
-};
-
-static void domain_init_recv(void *private_data_data, bool success);
-
-void async_domain_request(TALLOC_CTX *mem_ctx,
- struct winbindd_domain *domain,
- struct winbindd_request *request,
- struct winbindd_response *response,
- void (*continuation)(void *private_data_data, bool success),
- void *private_data_data)
-{
- struct domain_request_state *state;
-
- if (domain->initialized) {
- async_request(mem_ctx, &domain->child, request, response,
- continuation, private_data_data);
- return;
- }
-
- state = TALLOC_P(mem_ctx, struct domain_request_state);
- if (state == NULL) {
- DEBUG(0, ("talloc failed\n"));
- continuation(private_data_data, False);
- return;
- }
-
- state->mem_ctx = mem_ctx;
- state->domain = domain;
- state->request = request;
- state->response = response;
- state->continuation = continuation;
- state->private_data_data = private_data_data;
-
- init_child_connection(domain, domain_init_recv, state);
-}
-
-static void domain_init_recv(void *private_data_data, bool success)
-{
- struct domain_request_state *state =
- talloc_get_type_abort(private_data_data, struct domain_request_state);
-
- if (!success) {
- DEBUG(5, ("Domain init returned an error\n"));
- state->continuation(state->private_data_data, False);
- return;
- }
-
- async_request(state->mem_ctx, &state->domain->child,
- state->request, state->response,
- state->continuation, state->private_data_data);
-}
-
-static void recvfrom_child(void *private_data_data, bool success)
-{
- struct winbindd_cli_state *state =
- talloc_get_type_abort(private_data_data, struct winbindd_cli_state);
- enum winbindd_result result = state->response.result;
-
- /* This is an optimization: The child has written directly to the
- * response buffer. The request itself is still in pending state,
- * state that in the result code. */
-
- state->response.result = WINBINDD_PENDING;
-
- if ((!success) || (result != WINBINDD_OK)) {
- request_error(state);
- return;
- }
-
- request_ok(state);
-}
-
-void sendto_child(struct winbindd_cli_state *state,
- struct winbindd_child *child)
-{
- async_request(state->mem_ctx, child, state->request,
- &state->response, recvfrom_child, state);
-}
-
-void sendto_domain(struct winbindd_cli_state *state,
- struct winbindd_domain *domain)
-{
- async_domain_request(state->mem_ctx, domain,
- state->request, &state->response,
- recvfrom_child, state);
-}
-
static void child_process_request(struct winbindd_child *child,
struct winbindd_cli_state *state)
{
/* Free response data - we may be interrupted and receive another
command before being able to send this data off. */
- state->response.result = WINBINDD_ERROR;
- state->response.length = sizeof(struct winbindd_response);
+ state->response->result = WINBINDD_ERROR;
+ state->response->length = sizeof(struct winbindd_response);
/* as all requests in the child are sync, we can use talloc_tos() */
state->mem_ctx = talloc_tos();
if (state->request->cmd == table->struct_cmd) {
DEBUG(10,("child_process_request: request fn %s\n",
table->name));
- state->response.result = table->struct_fn(domain, state);
+ state->response->result = table->struct_fn(domain, state);
return;
}
}
DEBUG(1 ,("child_process_request: unknown request fn number %d\n",
(int)state->request->cmd));
- state->response.result = WINBINDD_ERROR;
+ state->response->result = WINBINDD_ERROR;
}
-void setup_child(struct winbindd_child *child,
+void setup_child(struct winbindd_domain *domain, struct winbindd_child *child,
const struct winbindd_child_dispatch_table *table,
const char *logprefix,
const char *logname)
"logname == NULL");
}
- child->domain = NULL;
+ child->domain = domain;
child->table = table;
child->queue = tevent_queue_create(NULL, "winbind_child");
SMB_ASSERT(child->queue != NULL);
+ child->rpccli = wbint_rpccli_create(NULL, domain, child);
+ SMB_ASSERT(child->rpccli != NULL);
}
struct winbindd_child *children = NULL;
}
for (child = children; child != NULL; child = child->next) {
- /* Don't send message to internal childs. We've already
+ /* Don't send message to internal children. We've already
done so above. */
if (!child->domain || winbindd_internal_child(child)) {
continue;
TALLOC_CTX *mem_ctx;
const char *message;
struct server_id *sender;
-
+
DEBUG(5,("winbind_msg_onlinestatus received.\n"));
if (!data->data) {
if (mem_ctx == NULL) {
return;
}
-
+
message = collect_onlinestatus(mem_ctx);
if (message == NULL) {
talloc_destroy(mem_ctx);
time_t pass_last_set_time;
time_t timeout;
time_t next_change;
+ struct timeval tv;
char *pw;
pw = secrets_fetch_machine_password(domain,
return false;
}
+ tv.tv_sec = pass_last_set_time;
+ DEBUG(10, ("password last changed %s\n",
+ timeval_string(talloc_tos(), &tv, false)));
+ tv.tv_sec += timeout;
+ DEBUGADD(10, ("password valid until %s\n",
+ timeval_string(talloc_tos(), &tv, false)));
+
if (time(NULL) < (pass_last_set_time + timeout)) {
next_change = pass_last_set_time + timeout;
DEBUG(10,("machine password still valid until: %s\n",
http_timestring(talloc_tos(), next_change)));
*t = timeval_set(next_change, 0);
+
+ if (lp_clustering()) {
+ uint8_t randbuf;
+ /*
+ * When having a cluster, we have several
+ * winbinds racing for the password change. In
+ * the machine_password_change_handler()
+ * function we check if someone else was
+ * faster when the event triggers. We add a
+ * 255-second random delay here, so that we
+ * don't run to change the password at the
+ * exact same moment.
+ */
+ generate_random_buffer(&randbuf, sizeof(randbuf));
+ DEBUG(10, ("adding %d seconds randomness\n",
+ (int)randbuf));
+ t->tv_sec += randbuf;
+ }
return true;
}
if (!calculate_next_machine_pwd_change(child->domain->name,
&next_change)) {
+ DEBUG(10, ("calculate_next_machine_pwd_change failed\n"));
return;
}
+ DEBUG(10, ("calculate_next_machine_pwd_change returned %s\n",
+ timeval_string(talloc_tos(), &next_change, false)));
+
+ if (!timeval_expired(&next_change)) {
+ DEBUG(10, ("Someone else has already changed the pw\n"));
+ goto done;
+ }
+
if (!winbindd_can_contact_domain(child->domain)) {
DEBUG(10,("machine_password_change_handler: Removing myself since I "
"do not have an incoming trust to domain %s\n",
child->domain->name);
TALLOC_FREE(frame);
+ DEBUG(10, ("machine_password_change_handler: "
+ "trust_pw_find_change_and_store_it returned %s\n",
+ nt_errstr(result)));
+
+ if (NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) ) {
+ DEBUG(3,("machine_password_change_handler: password set returned "
+ "ACCESS_DENIED. Maybe the trust account "
+ "password was changed and we didn't know it. "
+ "Killing connections to domain %s\n",
+ child->domain->name));
+ TALLOC_FREE(child->domain->conn.netlogon_pipe);
+ }
+
+ if (!calculate_next_machine_pwd_change(child->domain->name,
+ &next_change)) {
+ DEBUG(10, ("calculate_next_machine_pwd_change failed\n"));
+ return;
+ }
+
+ DEBUG(10, ("calculate_next_machine_pwd_change returned %s\n",
+ timeval_string(talloc_tos(), &next_change, false)));
+
if (!NT_STATUS_IS_OK(result)) {
- DEBUG(10,("machine_password_change_handler: "
- "failed to change machine password: %s\n",
- nt_errstr(result)));
- } else {
- DEBUG(10,("machine_password_change_handler: "
- "successfully changed machine password\n"));
+ struct timeval tmp;
+ /*
+ * In case of failure, give the DC a minute to recover
+ */
+ tmp = timeval_current_ofs(60, 0);
+ next_change = timeval_max(&next_change, &tmp);
}
+done:
child->machine_password_change_event = event_add_timed(winbind_event_context(), NULL,
next_change,
machine_password_change_handler,
logfilename))
return false;
+ /* Stop zombies in children */
+ CatchChild();
+
/* Don't handle the same messages as our parent. */
messaging_deregister(winbind_messaging_context(),
MSG_SMB_CONF_UPDATED, NULL);
return true;
}
+/*
+ * In a child there will be only one domain, reference that here.
+ */
+static struct winbindd_domain *child_domain;
+
+struct winbindd_domain *wb_child_domain(void)
+{
+ return child_domain;
+}
+
static bool fork_domain_child(struct winbindd_child *child)
{
int fdpair[2];
struct winbindd_cli_state state;
+ struct winbindd_request request;
+ struct winbindd_response response;
struct winbindd_domain *primary_domain = NULL;
if (child->domain) {
ZERO_STRUCT(state);
state.pid = sys_getpid();
- state.request = &state._request;
+ state.request = &request;
+ state.response = &response;
child->pid = sys_fork();
}
/* Child */
+ child_domain = child->domain;
DEBUG(10, ("Child process %d\n", (int)sys_getpid()));
- /* Stop zombies in children */
- CatchChild();
-
state.sock = fdpair[0];
close(fdpair[1]);
TALLOC_CTX *frame = talloc_stackframe();
struct iovec iov[2];
int iov_count;
+ NTSTATUS status;
if (run_events(winbind_event_context(), 0, NULL, NULL)) {
TALLOC_FREE(frame);
FD_SET(state.sock, &r_fds);
maxfd = state.sock;
+ /*
+ * Initialize this high as event_add_to_select_args()
+ * uses a timeval_min() on this and next_event. Fix
+ * from Roel van Meer <rolek@alt001.com>.
+ */
+ t.tv_sec = 999999;
+ t.tv_usec = 0;
+
event_add_to_select_args(winbind_event_context(), &now,
&r_fds, &w_fds, &t, &maxfd);
tp = get_timed_events_timeout(winbind_event_context(), &t);
}
/* fetch a request from the main daemon */
- child_read_request(&state);
+ status = child_read_request(&state);
- if (state.finished) {
+ if (!NT_STATUS_IS_OK(status)) {
/* we lost contact with our parent */
_exit(0);
}
DEBUG(4,("child daemon request %d\n", (int)state.request->cmd));
- ZERO_STRUCT(state.response);
+ ZERO_STRUCTP(state.response);
state.request->null_term = '\0';
+ state.mem_ctx = frame;
child_process_request(child, &state);
DEBUG(4, ("Finished processing child request %d\n",
SAFE_FREE(state.request->extra_data.data);
- iov[0].iov_base = (void *)&state.response;
+ iov[0].iov_base = (void *)state.response;
iov[0].iov_len = sizeof(struct winbindd_response);
iov_count = 1;
- if (state.response.length > sizeof(struct winbindd_response)) {
+ if (state.response->length > sizeof(struct winbindd_response)) {
iov[1].iov_base =
- (void *)state.response.extra_data.data;
- iov[1].iov_len = state.response.length-iov[0].iov_len;
+ (void *)state.response->extra_data.data;
+ iov[1].iov_len = state.response->length-iov[0].iov_len;
iov_count = 2;
}
DEBUG(10, ("Writing %d bytes to parent\n",
- (int)state.response.length));
+ (int)state.response->length));
if (write_data_iov(state.sock, iov, iov_count) !=
- state.response.length) {
+ state.response->length) {
DEBUG(0, ("Could not write result\n"));
exit(1);
}
git.samba.org / samba.git / blobdiff