-/*
+/*
Unix SMB/CIFS implementation.
LDAP server
#include "../lib/util/dlinklist.h"
#include "../lib/util/asn1.h"
#include "ldap_server/ldap_server.h"
-#include "smbd/service_task.h"
-#include "smbd/service_stream.h"
-#include "smbd/service.h"
-#include "smbd/process_model.h"
+#include "samba/service_task.h"
+#include "samba/service_stream.h"
+#include "samba/service.h"
+#include "samba/process_model.h"
#include "lib/tls/tls.h"
#include "lib/messaging/irpc.h"
#include <ldb.h>
#include "../lib/tsocket/tsocket.h"
#include "../lib/util/tevent_ntstatus.h"
#include "../libcli/util/tstream.h"
+#include "libds/common/roles.h"
+#include "lib/util/time.h"
+#include "lib/util/server_id.h"
+#include "lib/util/server_id_db.h"
+#include "lib/messaging/messaging_internal.h"
+
+#undef strcasecmp
static void ldapsrv_terminate_connection_done(struct tevent_req *subreq);
return;
}
+ DLIST_REMOVE(conn->service->connections, conn);
+
conn->limits.endtime = timeval_current_ofs(0, 500);
tevent_queue_stop(conn->sockets.send_queue);
+ TALLOC_FREE(conn->sockets.read_req);
+ TALLOC_FREE(conn->deferred_expire_disconnect);
if (conn->active_call) {
tevent_req_cancel(conn->active_call);
conn->active_call = NULL;
struct ldapsrv_connection *conn =
tevent_req_callback_data(subreq,
struct ldapsrv_connection);
- int ret;
int sys_errno;
+ bool ok;
- ret = tstream_disconnect_recv(subreq, &sys_errno);
+ tstream_disconnect_recv(subreq, &sys_errno);
TALLOC_FREE(subreq);
if (conn->sockets.active == conn->sockets.raw) {
conn->limits.reason);
return;
}
- tevent_req_set_endtime(subreq,
- conn->connection->event.ctx,
- conn->limits.endtime);
+ ok = tevent_req_set_endtime(subreq,
+ conn->connection->event.ctx,
+ conn->limits.endtime);
+ if (!ok) {
+ TALLOC_FREE(conn->sockets.raw);
+ stream_terminate_connection(conn->connection,
+ conn->limits.reason);
+ return;
+ }
tevent_req_set_callback(subreq, ldapsrv_terminate_connection_done, conn);
}
conn->limits.initial_timeout = 120;
conn->limits.conn_idle_time = 900;
conn->limits.max_page_size = 1000;
+ conn->limits.max_notifications = 5;
conn->limits.search_timeout = 120;
+ conn->limits.expire_time = (struct timeval) {
+ .tv_sec = get_time_t_max(),
+ };
tmp_ctx = talloc_new(conn);
int policy_value, s;
s = sscanf((const char *)el->values[i].data, "%255[^=]=%d", policy_name, &policy_value);
- if (ret != 2 || policy_value == 0)
+ if (s != 2 || policy_value == 0)
continue;
-
if (strcasecmp("InitRecvTimeout", policy_name) == 0) {
conn->limits.initial_timeout = policy_value;
continue;
conn->limits.max_page_size = policy_value;
continue;
}
+ if (strcasecmp("MaxNotificationPerConn", policy_name) == 0) {
+ conn->limits.max_notifications = policy_value;
+ continue;
+ }
if (strcasecmp("MaxQueryDuration", policy_name) == 0) {
- conn->limits.search_timeout = policy_value;
+ if (policy_value > 0) {
+ conn->limits.search_timeout = policy_value;
+ }
continue;
}
}
return 0;
failed:
- DEBUG(0, ("Failed to load ldap server query policies\n"));
+ DBG_ERR("Failed to load ldap server query policies\n");
talloc_free(tmp_ctx);
return -1;
}
+static int ldapsrv_call_destructor(struct ldapsrv_call *call)
+{
+ if (call->conn == NULL) {
+ return 0;
+ }
+
+ DLIST_REMOVE(call->conn->pending_calls, call);
+
+ call->conn = NULL;
+ return 0;
+}
+
static struct tevent_req *ldapsrv_process_call_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct tevent_queue *call_queue,
*/
static void ldapsrv_accept(struct stream_connection *c,
struct auth_session_info *session_info,
- bool is_privileged)
+ bool is_privileged,
+ bool is_ldapi)
{
- struct ldapsrv_service *ldapsrv_service =
+ struct ldapsrv_service *ldapsrv_service =
talloc_get_type(c->private_data, struct ldapsrv_service);
struct ldapsrv_connection *conn;
struct cli_credentials *server_credentials;
struct socket_address *socket_address;
- NTSTATUS status;
int port;
int ret;
struct tevent_req *subreq;
struct timeval endtime;
+ char *errstring = NULL;
conn = talloc_zero(c, struct ldapsrv_connection);
if (!conn) {
return;
}
conn->is_privileged = is_privileged;
+ conn->is_ldapi = is_ldapi;
- conn->sockets.send_queue = tevent_queue_create(conn, "ldapsev send queue");
+ conn->sockets.send_queue = tevent_queue_create(conn, "ldapsrv send queue");
if (conn->sockets.send_queue == NULL) {
stream_terminate_connection(c,
"ldapsrv_accept: tevent_queue_create failed");
return;
}
socket_set_flags(c->socket, SOCKET_FLAG_NOCLOSE);
+ /* as server we want to fail early */
+ tstream_bsd_fail_readv_first_error(conn->sockets.raw, true);
conn->connection = c;
conn->service = ldapsrv_service;
- conn->lp_ctx = ldapsrv_service->task->lp_ctx;
+ conn->lp_ctx = ldapsrv_service->lp_ctx;
c->private_data = conn;
conn->global_catalog = true;
}
- server_credentials = cli_credentials_init(conn);
+ server_credentials = cli_credentials_init_server(conn, conn->lp_ctx);
if (!server_credentials) {
stream_terminate_connection(c, "Failed to init server credentials\n");
return;
}
- cli_credentials_set_conf(server_credentials, conn->lp_ctx);
- status = cli_credentials_set_machine_account(server_credentials, conn->lp_ctx);
- if (!NT_STATUS_IS_OK(status)) {
- stream_terminate_connection(c, talloc_asprintf(conn, "Failed to obtain server credentials, perhaps a standalone server?: %s\n", nt_errstr(status)));
- return;
- }
conn->server_credentials = server_credentials;
conn->session_info = session_info;
- if (!NT_STATUS_IS_OK(ldapsrv_backend_Init(conn))) {
- ldapsrv_terminate_connection(conn, "backend Init failed");
+ conn->sockets.active = conn->sockets.raw;
+
+ if (conn->is_privileged) {
+ conn->require_strong_auth = LDAP_SERVER_REQUIRE_STRONG_AUTH_NO;
+ } else {
+ conn->require_strong_auth = lpcfg_ldap_server_require_strong_auth(conn->lp_ctx);
+ }
+
+ if (conn->require_strong_auth ==
+ LDAP_SERVER_REQUIRE_STRONG_AUTH_ALLOW_SASL_OVER_TLS)
+ {
+ D_ERR("WARNING: You have not configured "
+ "'ldap server require strong auth = "
+ "allow_sasl_over_tls'.\n"
+ "Please change to 'yes' (preferred and default) or "
+ "'allow_sasl_without_tls_channel_bindings' "
+ "(if really needed)\n\n");
+ }
+
+ ret = ldapsrv_backend_Init(conn, &errstring);
+ if (ret != LDB_SUCCESS) {
+ char *reason = talloc_asprintf(conn,
+ "LDB backend for LDAP Init "
+ "failed: %s: %s",
+ errstring, ldb_strerror(ret));
+ ldapsrv_terminate_connection(conn, reason);
return;
}
/* load limits from the conf partition */
ldapsrv_load_limits(conn); /* should we fail on error ? */
- /* register the server */
+ /* register the server */
irpc_add_name(c->msg_ctx, "ldap_server");
- conn->sockets.active = conn->sockets.raw;
+ DLIST_ADD_END(ldapsrv_service->connections, conn);
if (port != 636 && port != 3269) {
ldapsrv_call_read_next(conn);
}
conn->sockets.active = conn->sockets.tls;
+ conn->referral_scheme = LDAP_REFERRAL_SCHEME_LDAPS;
ldapsrv_call_read_next(conn);
}
static void ldapsrv_call_read_done(struct tevent_req *subreq);
+static NTSTATUS ldapsrv_packet_check(
+ struct tstream_context *stream,
+ void *private_data,
+ DATA_BLOB blob,
+ size_t *packet_size);
static bool ldapsrv_call_read_next(struct ldapsrv_connection *conn)
{
struct tevent_req *subreq;
- if (timeval_is_zero(&conn->limits.endtime)) {
+ if (conn->pending_calls != NULL) {
+ conn->limits.endtime = timeval_zero();
+
+ ldapsrv_notification_retry_setup(conn->service, false);
+ } else if (timeval_is_zero(&conn->limits.endtime)) {
conn->limits.endtime =
timeval_current_ofs(conn->limits.initial_timeout, 0);
} else {
timeval_current_ofs(conn->limits.conn_idle_time, 0);
}
+ if (conn->sockets.read_req != NULL) {
+ return true;
+ }
+
/*
- * The minimun size of a LDAP pdu is 7 bytes
+ * The minimum size of a LDAP pdu is 7 bytes
*
* dumpasn1 -hh ldap-unbind-min.dat
*
conn->connection->event.ctx,
conn->sockets.active,
7, /* initial_read_size */
- ldap_full_packet,
+ ldapsrv_packet_check,
conn);
if (subreq == NULL) {
ldapsrv_terminate_connection(conn, "ldapsrv_call_read_next: "
"no memory for tstream_read_pdu_blob_send");
return false;
}
- tevent_req_set_endtime(subreq,
- conn->connection->event.ctx,
- conn->limits.endtime);
+ if (!timeval_is_zero(&conn->limits.endtime)) {
+ bool ok;
+ ok = tevent_req_set_endtime(subreq,
+ conn->connection->event.ctx,
+ conn->limits.endtime);
+ if (!ok) {
+ ldapsrv_terminate_connection(
+ conn,
+ "ldapsrv_call_read_next: "
+ "no memory for tevent_req_set_endtime");
+ return false;
+ }
+ }
tevent_req_set_callback(subreq, ldapsrv_call_read_done, conn);
+ conn->sockets.read_req = subreq;
return true;
}
static void ldapsrv_call_process_done(struct tevent_req *subreq);
+static int ldapsrv_check_packet_size(
+ struct ldapsrv_connection *conn,
+ size_t size);
static void ldapsrv_call_read_done(struct tevent_req *subreq)
{
struct ldapsrv_call *call;
struct asn1_data *asn1;
DATA_BLOB blob;
+ int ret = LDAP_SUCCESS;
+ struct ldap_request_limits limits = {0};
+
+ conn->sockets.read_req = NULL;
call = talloc_zero(conn, struct ldapsrv_call);
if (!call) {
ldapsrv_terminate_connection(conn, "no memory");
return;
}
+ talloc_set_destructor(call, ldapsrv_call_destructor);
call->conn = conn;
return;
}
- asn1 = asn1_init(call);
+ ret = ldapsrv_check_packet_size(conn, blob.length);
+ if (ret != LDAP_SUCCESS) {
+ ldapsrv_terminate_connection(
+ conn,
+ "Request packet too large");
+ return;
+ }
+
+ asn1 = asn1_init(call, ASN1_MAX_TREE_DEPTH);
if (asn1 == NULL) {
ldapsrv_terminate_connection(conn, "no memory");
return;
return;
}
- if (!asn1_load(asn1, blob)) {
- ldapsrv_terminate_connection(conn, "asn1_load failed");
- return;
- }
+ asn1_load_nocopy(asn1, blob.data, blob.length);
- status = ldap_decode(asn1, samba_ldap_control_handlers(),
- call->request);
+ limits.max_search_size =
+ lpcfg_ldap_max_search_request_size(conn->lp_ctx);
+ status = ldap_decode(
+ asn1,
+ &limits,
+ samba_ldap_control_handlers(),
+ call->request);
if (!NT_STATUS_IS_OK(status)) {
ldapsrv_terminate_connection(conn, nt_errstr(status));
return;
}
data_blob_free(&blob);
+ TALLOC_FREE(asn1);
/* queue the call in the global queue */
conn->active_call = subreq;
}
+static void ldapsrv_call_wait_done(struct tevent_req *subreq);
+static void ldapsrv_call_writev_start(struct ldapsrv_call *call);
static void ldapsrv_call_writev_done(struct tevent_req *subreq);
static void ldapsrv_call_process_done(struct tevent_req *subreq)
struct ldapsrv_call);
struct ldapsrv_connection *conn = call->conn;
NTSTATUS status;
- DATA_BLOB blob = data_blob_null;
conn->active_call = NULL;
return;
}
- /* build all the replies into a single blob */
- while (call->replies) {
- DATA_BLOB b;
- bool ret;
-
- if (!ldap_encode(call->replies->msg, samba_ldap_control_handlers(), &b, call)) {
- DEBUG(0,("Failed to encode ldap reply of type %d\n",
- call->replies->msg->type));
- ldapsrv_terminate_connection(conn, "ldap_encode failed");
+ if (call->wait_send != NULL) {
+ subreq = call->wait_send(call,
+ conn->connection->event.ctx,
+ call->wait_private);
+ if (subreq == NULL) {
+ ldapsrv_terminate_connection(conn,
+ "ldapsrv_call_process_done: "
+ "call->wait_send - no memory");
return;
}
+ tevent_req_set_callback(subreq,
+ ldapsrv_call_wait_done,
+ call);
+ conn->active_call = subreq;
+ return;
+ }
+
+ ldapsrv_call_writev_start(call);
+}
+
+static void ldapsrv_call_wait_done(struct tevent_req *subreq)
+{
+ struct ldapsrv_call *call =
+ tevent_req_callback_data(subreq,
+ struct ldapsrv_call);
+ struct ldapsrv_connection *conn = call->conn;
+ NTSTATUS status;
- ret = data_blob_append(call, &blob, b.data, b.length);
- data_blob_free(&b);
+ conn->active_call = NULL;
- talloc_set_name_const(blob.data, "Outgoing, encoded LDAP packet");
+ status = call->wait_recv(subreq);
+ TALLOC_FREE(subreq);
+ if (!NT_STATUS_IS_OK(status)) {
+ const char *reason;
- if (!ret) {
- ldapsrv_terminate_connection(conn, "data_blob_append failed");
- return;
+ reason = talloc_asprintf(call, "ldapsrv_call_wait_done: "
+ "call->wait_recv() - %s",
+ nt_errstr(status));
+ if (reason == NULL) {
+ reason = nt_errstr(status);
}
- DLIST_REMOVE(call->replies, call->replies);
+ ldapsrv_terminate_connection(conn, reason);
+ return;
}
- if (blob.length == 0) {
- TALLOC_FREE(call);
+ ldapsrv_call_writev_start(call);
+}
+
+static void ldapsrv_call_writev_start(struct ldapsrv_call *call)
+{
+ struct ldapsrv_connection *conn = call->conn;
+ struct ldapsrv_reply *reply = NULL;
+ struct tevent_req *subreq = NULL;
+ struct timeval endtime;
+ size_t length = 0;
+ size_t i;
+
+ call->iov_count = 0;
+
+ /* build all the replies into an IOV (no copy) */
+ for (reply = call->replies;
+ reply != NULL;
+ reply = reply->next) {
+
+ /* Cap output at 25MB per writev() */
+ if (length > length + reply->blob.length
+ || length + reply->blob.length > LDAP_SERVER_MAX_CHUNK_SIZE) {
+ break;
+ }
+
+ /*
+ * Overflow is harmless here, just used below to
+ * decide if to read or write, but checked above anyway
+ */
+ length += reply->blob.length;
+
+ /*
+ * At worst an overflow would mean we send less
+ * replies
+ */
+ call->iov_count++;
+ }
+
+ if (length == 0) {
+ if (!call->notification.busy) {
+ TALLOC_FREE(call);
+ }
ldapsrv_call_read_next(conn);
return;
}
- call->out_iov.iov_base = blob.data;
- call->out_iov.iov_len = blob.length;
+ /* Cap call->iov_count at IOV_MAX */
+ call->iov_count = MIN(call->iov_count, IOV_MAX);
+
+ call->out_iov = talloc_array(call,
+ struct iovec,
+ call->iov_count);
+ if (!call->out_iov) {
+ /* This is not ideal */
+ ldapsrv_terminate_connection(conn,
+ "failed to allocate "
+ "iovec array");
+ return;
+ }
+
+ /* We may have had to cap the number of replies at IOV_MAX */
+ for (i = 0;
+ i < call->iov_count && call->replies != NULL;
+ i++) {
+ reply = call->replies;
+ call->out_iov[i].iov_base = reply->blob.data;
+ call->out_iov[i].iov_len = reply->blob.length;
+
+ /* Keep only the ASN.1 encoded data */
+ talloc_steal(call->out_iov, reply->blob.data);
+
+ DLIST_REMOVE(call->replies, reply);
+ TALLOC_FREE(reply);
+ }
+
+ if (i > call->iov_count) {
+ /* This is not ideal, but also (essentially) impossible */
+ ldapsrv_terminate_connection(conn,
+ "call list ended"
+ "before iov_count");
+ return;
+ }
subreq = tstream_writev_queue_send(call,
conn->connection->event.ctx,
conn->sockets.active,
conn->sockets.send_queue,
- &call->out_iov, 1);
+ call->out_iov, call->iov_count);
if (subreq == NULL) {
ldapsrv_terminate_connection(conn, "stream_writev_queue_send failed");
return;
}
+ endtime = timeval_current_ofs(conn->limits.conn_idle_time, 0);
+ tevent_req_set_endtime(subreq,
+ conn->connection->event.ctx,
+ endtime);
tevent_req_set_callback(subreq, ldapsrv_call_writev_done, call);
}
rc = tstream_writev_queue_recv(subreq, &sys_errno);
TALLOC_FREE(subreq);
+
+ /* This releases the ASN.1 encoded packets from memory */
+ TALLOC_FREE(call->out_iov);
if (rc == -1) {
const char *reason;
return;
}
- TALLOC_FREE(call);
+ /* Perhaps still some more to send */
+ if (call->replies != NULL) {
+ ldapsrv_call_writev_start(call);
+ return;
+ }
+
+ if (!call->notification.busy) {
+ TALLOC_FREE(call);
+ }
ldapsrv_call_read_next(conn);
}
ldapsrv_call_read_next(conn);
}
+static void ldapsrv_notification_retry_done(struct tevent_req *subreq);
+
+void ldapsrv_notification_retry_setup(struct ldapsrv_service *service, bool force)
+{
+ struct ldapsrv_connection *conn = NULL;
+ struct timeval retry;
+ size_t num_pending = 0;
+ size_t num_active = 0;
+
+ if (force) {
+ TALLOC_FREE(service->notification.retry);
+ service->notification.generation += 1;
+ }
+
+ if (service->notification.retry != NULL) {
+ return;
+ }
+
+ for (conn = service->connections; conn != NULL; conn = conn->next) {
+ if (conn->pending_calls == NULL) {
+ continue;
+ }
+
+ num_pending += 1;
+
+ if (conn->pending_calls->notification.generation !=
+ service->notification.generation)
+ {
+ num_active += 1;
+ }
+ }
+
+ if (num_pending == 0) {
+ return;
+ }
+
+ if (num_active != 0) {
+ retry = timeval_current_ofs(0, 100);
+ } else {
+ retry = timeval_current_ofs(5, 0);
+ }
+
+ service->notification.retry = tevent_wakeup_send(service,
+ service->current_ev,
+ retry);
+ if (service->notification.retry == NULL) {
+ /* retry later */
+ return;
+ }
+
+ tevent_req_set_callback(service->notification.retry,
+ ldapsrv_notification_retry_done,
+ service);
+}
+
+static void ldapsrv_notification_retry_done(struct tevent_req *subreq)
+{
+ struct ldapsrv_service *service =
+ tevent_req_callback_data(subreq,
+ struct ldapsrv_service);
+ struct ldapsrv_connection *conn = NULL;
+ struct ldapsrv_connection *conn_next = NULL;
+ bool ok;
+
+ service->notification.retry = NULL;
+
+ ok = tevent_wakeup_recv(subreq);
+ TALLOC_FREE(subreq);
+ if (!ok) {
+ /* ignore */
+ }
+
+ for (conn = service->connections; conn != NULL; conn = conn_next) {
+ struct ldapsrv_call *call = conn->pending_calls;
+
+ conn_next = conn->next;
+
+ if (conn->pending_calls == NULL) {
+ continue;
+ }
+
+ if (conn->active_call != NULL) {
+ continue;
+ }
+
+ DLIST_DEMOTE(conn->pending_calls, call);
+ call->notification.generation =
+ service->notification.generation;
+
+ /* queue the call in the global queue */
+ subreq = ldapsrv_process_call_send(call,
+ conn->connection->event.ctx,
+ conn->service->call_queue,
+ call);
+ if (subreq == NULL) {
+ ldapsrv_terminate_connection(conn,
+ "ldapsrv_process_call_send failed");
+ continue;
+ }
+ tevent_req_set_callback(subreq, ldapsrv_call_process_done, call);
+ conn->active_call = subreq;
+ }
+
+ ldapsrv_notification_retry_setup(service, false);
+}
+
struct ldapsrv_process_call_state {
struct ldapsrv_call *call;
};
return req;
}
+static void ldapsrv_disconnect_ticket_expired(struct tevent_req *subreq);
+
static void ldapsrv_process_call_trigger(struct tevent_req *req,
void *private_data)
{
struct ldapsrv_process_call_state *state =
tevent_req_data(req,
struct ldapsrv_process_call_state);
+ struct ldapsrv_connection *conn = state->call->conn;
NTSTATUS status;
+ if (conn->deferred_expire_disconnect != NULL) {
+ /*
+ * Just drop this on the floor
+ */
+ tevent_req_done(req);
+ return;
+ }
+
/* make the call */
status = ldapsrv_do_call(state->call);
+
+ if (NT_STATUS_EQUAL(status, NT_STATUS_NETWORK_SESSION_EXPIRED)) {
+ /*
+ * For testing purposes, defer the TCP disconnect
+ * after having sent the msgid 0
+ * 1.3.6.1.4.1.1466.20036 exop response. LDAP clients
+ * should not wait for the TCP connection to close but
+ * handle this packet equivalent to a TCP
+ * disconnect. This delay enables testing both cases
+ * in LDAP client libraries.
+ */
+
+ int defer_msec = lpcfg_parm_int(
+ conn->lp_ctx,
+ NULL,
+ "ldap_server",
+ "delay_expire_disconnect",
+ 0);
+
+ conn->deferred_expire_disconnect = tevent_wakeup_send(
+ conn,
+ conn->connection->event.ctx,
+ timeval_current_ofs_msec(defer_msec));
+ if (tevent_req_nomem(conn->deferred_expire_disconnect, req)) {
+ return;
+ }
+ tevent_req_set_callback(
+ conn->deferred_expire_disconnect,
+ ldapsrv_disconnect_ticket_expired,
+ conn);
+
+ tevent_req_done(req);
+ return;
+ }
+
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return;
tevent_req_done(req);
}
+static void ldapsrv_disconnect_ticket_expired(struct tevent_req *subreq)
+{
+ struct ldapsrv_connection *conn = tevent_req_callback_data(
+ subreq, struct ldapsrv_connection);
+ bool ok;
+
+ ok = tevent_wakeup_recv(subreq);
+ TALLOC_FREE(subreq);
+ if (!ok) {
+ DBG_WARNING("tevent_wakeup_recv failed\n");
+ }
+ conn->deferred_expire_disconnect = NULL;
+ ldapsrv_terminate_connection(conn, "network session expired");
+}
+
static NTSTATUS ldapsrv_process_call_recv(struct tevent_req *req)
{
NTSTATUS status;
NTSTATUS status;
status = auth_anonymous_session_info(
- c, ldapsrv_service->task->lp_ctx, &session_info);
+ c, ldapsrv_service->lp_ctx, &session_info);
if (!NT_STATUS_IS_OK(status)) {
stream_terminate_connection(c, "failed to setup anonymous "
"session info");
return;
}
- ldapsrv_accept(c, session_info, false);
+ ldapsrv_accept(c, session_info, false, false);
}
static const struct stream_server_ops ldap_stream_nonpriv_ops = {
.send_handler = ldapsrv_send,
};
+static void ldapsrv_accept_nonpriv_ldapi(struct stream_connection *c)
+{
+ struct ldapsrv_service *ldapsrv_service = talloc_get_type_abort(
+ c->private_data, struct ldapsrv_service);
+ struct auth_session_info *session_info;
+ NTSTATUS status;
+
+ status = auth_anonymous_session_info(
+ c, ldapsrv_service->lp_ctx, &session_info);
+ if (!NT_STATUS_IS_OK(status)) {
+ stream_terminate_connection(c, "failed to setup anonymous "
+ "session info");
+ return;
+ }
+ ldapsrv_accept(c, session_info, false, true);
+}
+
+static const struct stream_server_ops ldapi_stream_nonpriv_ops = {
+ .name = "ldap",
+ .accept_connection = ldapsrv_accept_nonpriv_ldapi,
+ .recv_handler = ldapsrv_recv,
+ .send_handler = ldapsrv_send,
+};
+
/* The feature removed behind an #ifdef until we can do it properly
* with an EXTERNAL bind. */
#define WITH_LDAPI_PRIV_SOCKET
#ifdef WITH_LDAPI_PRIV_SOCKET
-static void ldapsrv_accept_priv(struct stream_connection *c)
+static void ldapsrv_accept_priv_ldapi(struct stream_connection *c)
{
struct ldapsrv_service *ldapsrv_service = talloc_get_type_abort(
c->private_data, struct ldapsrv_service);
struct auth_session_info *session_info;
- session_info = system_session(ldapsrv_service->task->lp_ctx);
+ session_info = system_session(ldapsrv_service->lp_ctx);
if (!session_info) {
stream_terminate_connection(c, "failed to setup system "
"session info");
return;
}
- ldapsrv_accept(c, session_info, true);
+ ldapsrv_accept(c, session_info, true, true);
}
-static const struct stream_server_ops ldap_stream_priv_ops = {
+static const struct stream_server_ops ldapi_stream_priv_ops = {
.name = "ldap",
- .accept_connection = ldapsrv_accept_priv,
+ .accept_connection = ldapsrv_accept_priv_ldapi,
.recv_handler = ldapsrv_recv,
.send_handler = ldapsrv_send,
};
model_ops, &ldap_stream_nonpriv_ops,
"ip", address, &port,
lpcfg_socket_options(lp_ctx),
- ldap_service);
+ ldap_service, task->process_context);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
- address, port, nt_errstr(status)));
+ DBG_ERR("ldapsrv failed to bind to %s:%u - %s\n",
+ address, port, nt_errstr(status));
return status;
}
&ldap_stream_nonpriv_ops,
"ip", address, &port,
lpcfg_socket_options(lp_ctx),
- ldap_service);
+ ldap_service,
+ task->process_context);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
- address, port, nt_errstr(status)));
+ DBG_ERR("ldapsrv failed to bind to %s:%u - %s\n",
+ address, port, nt_errstr(status));
return status;
}
}
/* Load LDAP database, but only to read our settings */
- ldb = samdb_connect(ldap_service, ldap_service->task->event_ctx,
- lp_ctx, system_session(lp_ctx), 0);
+ ldb = samdb_connect(ldap_service,
+ ldap_service->current_ev,
+ lp_ctx,
+ system_session(lp_ctx),
+ NULL,
+ 0);
if (!ldb) {
return NT_STATUS_INTERNAL_DB_CORRUPTION;
}
&ldap_stream_nonpriv_ops,
"ip", address, &port,
lpcfg_socket_options(lp_ctx),
- ldap_service);
+ ldap_service,
+ task->process_context);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
- address, port, nt_errstr(status)));
+ DBG_ERR("ldapsrv failed to bind to %s:%u - %s\n",
+ address, port, nt_errstr(status));
return status;
}
if (tstream_tls_params_enabled(ldap_service->tls_params)) {
&ldap_stream_nonpriv_ops,
"ip", address, &port,
lpcfg_socket_options(lp_ctx),
- ldap_service);
+ ldap_service,
+ task->process_context);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0,("ldapsrv failed to bind to %s:%u - %s\n",
- address, port, nt_errstr(status)));
+ DBG_ERR("ldapsrv failed to bind to %s:%u - %s\n",
+ address, port, nt_errstr(status));
return status;
}
}
return NT_STATUS_OK;
}
+static void ldap_reload_certs(struct imessaging_context *msg_ctx,
+ void *private_data,
+ uint32_t msg_type,
+ struct server_id server_id,
+ size_t num_fds,
+ int *fds,
+ DATA_BLOB *data)
+{
+ TALLOC_CTX *frame = talloc_stackframe();
+ struct ldapsrv_service *ldap_service =
+ talloc_get_type_abort(private_data,
+ struct ldapsrv_service);
+ int default_children;
+ int num_children;
+ int i;
+ bool ok;
+ struct server_id ldap_master_id;
+ NTSTATUS status;
+ struct tstream_tls_params *new_tls_params = NULL;
+
+ SMB_ASSERT(msg_ctx == ldap_service->current_msg);
+
+ /* reload certificates */
+ status = tstream_tls_params_server(ldap_service,
+ ldap_service->dns_host_name,
+ lpcfg_tls_enabled(ldap_service->lp_ctx),
+ lpcfg_tls_keyfile(frame, ldap_service->lp_ctx),
+ lpcfg_tls_certfile(frame, ldap_service->lp_ctx),
+ lpcfg_tls_cafile(frame, ldap_service->lp_ctx),
+ lpcfg_tls_crlfile(frame, ldap_service->lp_ctx),
+ lpcfg_tls_dhpfile(frame, ldap_service->lp_ctx),
+ lpcfg_tls_priority(ldap_service->lp_ctx),
+ &new_tls_params);
+ if (!NT_STATUS_IS_OK(status)) {
+ DBG_ERR("ldapsrv failed tstream_tls_params_server - %s\n",
+ nt_errstr(status));
+ TALLOC_FREE(frame);
+ return;
+ }
+
+ TALLOC_FREE(ldap_service->tls_params);
+ ldap_service->tls_params = new_tls_params;
+
+ if (getpid() != ldap_service->parent_pid) {
+ /*
+ * If we are not the master process we are done
+ */
+ TALLOC_FREE(frame);
+ return;
+ }
+
+ /*
+ * Check we're running under the prefork model,
+ * by checking if the prefork-master-ldap name
+ * was registered
+ */
+ ok = server_id_db_lookup_one(msg_ctx->names, "prefork-master-ldap", &ldap_master_id);
+ if (!ok) {
+ /*
+ * We are done if another process model is in use.
+ */
+ TALLOC_FREE(frame);
+ return;
+ }
+
+ /*
+ * Now we loop over all possible prefork workers
+ * in order to notify them about the reload
+ */
+ default_children = lpcfg_prefork_children(ldap_service->lp_ctx);
+ num_children = lpcfg_parm_int(ldap_service->lp_ctx,
+ NULL, "prefork children", "ldap",
+ default_children);
+ for (i = 0; i < num_children; i++) {
+ char child_name[64] = { 0, };
+ struct server_id ldap_worker_id;
+
+ snprintf(child_name, sizeof(child_name), "prefork-worker-ldap-%d", i);
+ ok = server_id_db_lookup_one(msg_ctx->names, child_name, &ldap_worker_id);
+ if (!ok) {
+ DBG_ERR("server_id_db_lookup_one(%s) - failed\n",
+ child_name);
+ continue;
+ }
+
+ status = imessaging_send(msg_ctx, ldap_worker_id,
+ MSG_RELOAD_TLS_CERTIFICATES, NULL);
+ if (!NT_STATUS_IS_OK(status)) {
+ struct server_id_buf id_buf;
+ DBG_ERR("ldapsrv failed imessaging_send(%s, %s) - %s\n",
+ child_name,
+ server_id_str_buf(ldap_worker_id, &id_buf),
+ nt_errstr(status));
+ continue;
+ }
+ }
+
+ TALLOC_FREE(frame);
+}
+
/*
open the ldap server sockets
*/
-static void ldapsrv_task_init(struct task_server *task)
-{
+static NTSTATUS ldapsrv_task_init(struct task_server *task)
+{
char *ldapi_path;
#ifdef WITH_LDAPI_PRIV_SOCKET
char *priv_dir;
#endif
- const char *dns_host_name;
struct ldapsrv_service *ldap_service;
NTSTATUS status;
- const struct model_ops *model_ops;
switch (lpcfg_server_role(task->lp_ctx)) {
case ROLE_STANDALONE:
- task_server_terminate(task, "ldap_server: no LDAP server required in standalone configuration",
+ task_server_terminate(task, "ldap_server: no LDAP server required in standalone configuration",
false);
- return;
+ return NT_STATUS_INVALID_DOMAIN_ROLE;
case ROLE_DOMAIN_MEMBER:
- task_server_terminate(task, "ldap_server: no LDAP server required in member server configuration",
+ task_server_terminate(task, "ldap_server: no LDAP server required in member server configuration",
false);
- return;
- case ROLE_DOMAIN_CONTROLLER:
+ return NT_STATUS_INVALID_DOMAIN_ROLE;
+ case ROLE_ACTIVE_DIRECTORY_DC:
/* Yes, we want an LDAP server */
break;
}
task_server_set_title(task, "task[ldapsrv]");
- /* run the ldap server as a single process */
- model_ops = process_model_startup("single");
- if (!model_ops) goto failed;
-
ldap_service = talloc_zero(task, struct ldapsrv_service);
- if (ldap_service == NULL) goto failed;
+ if (ldap_service == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto failed;
+ }
- ldap_service->task = task;
+ ldap_service->lp_ctx = task->lp_ctx;
+ ldap_service->current_ev = task->event_ctx;
+ ldap_service->current_msg = task->msg_ctx;
- dns_host_name = talloc_asprintf(ldap_service, "%s.%s",
+ ldap_service->dns_host_name = talloc_asprintf(ldap_service, "%s.%s",
lpcfg_netbios_name(task->lp_ctx),
lpcfg_dnsdomain(task->lp_ctx));
- if (dns_host_name == NULL) goto failed;
+ if (ldap_service->dns_host_name == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto failed;
+ }
+
+ ldap_service->parent_pid = getpid();
status = tstream_tls_params_server(ldap_service,
- dns_host_name,
+ ldap_service->dns_host_name,
lpcfg_tls_enabled(task->lp_ctx),
lpcfg_tls_keyfile(ldap_service, task->lp_ctx),
lpcfg_tls_certfile(ldap_service, task->lp_ctx),
lpcfg_tls_cafile(ldap_service, task->lp_ctx),
lpcfg_tls_crlfile(ldap_service, task->lp_ctx),
lpcfg_tls_dhpfile(ldap_service, task->lp_ctx),
+ lpcfg_tls_priority(task->lp_ctx),
&ldap_service->tls_params);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0,("ldapsrv failed tstream_tls_patams_server - %s\n",
- nt_errstr(status)));
+ DBG_ERR("ldapsrv failed tstream_tls_params_server - %s\n",
+ nt_errstr(status));
goto failed;
}
ldap_service->call_queue = tevent_queue_create(ldap_service, "ldapsrv_call_queue");
- if (ldap_service->call_queue == NULL) goto failed;
+ if (ldap_service->call_queue == NULL) {
+ status = NT_STATUS_NO_MEMORY;
+ goto failed;
+ }
if (lpcfg_interfaces(task->lp_ctx) && lpcfg_bind_interfaces_only(task->lp_ctx)) {
struct interface *ifaces;
load_interface_list(task, task->lp_ctx, &ifaces);
num_interfaces = iface_list_count(ifaces);
- /* We have been given an interfaces line, and been
+ /* We have been given an interfaces line, and been
told to only bind to those interfaces. Create a
socket per interface and bind to only these.
*/
for(i = 0; i < num_interfaces; i++) {
const char *address = iface_list_n_ip(ifaces, i);
- status = add_socket(task, task->lp_ctx, model_ops, address, ldap_service);
+ status = add_socket(task, task->lp_ctx, task->model_ops,
+ address, ldap_service);
if (!NT_STATUS_IS_OK(status)) goto failed;
}
} else {
- const char **wcard;
- int i;
- wcard = iface_list_wildcard(task, task->lp_ctx);
+ char **wcard;
+ size_t i;
+ size_t num_binds = 0;
+ wcard = iface_list_wildcard(task);
if (wcard == NULL) {
- DEBUG(0,("No wildcard addresses available\n"));
+ DBG_ERR("No wildcard addresses available\n");
+ status = NT_STATUS_UNSUCCESSFUL;
goto failed;
}
for (i=0; wcard[i]; i++) {
- status = add_socket(task, task->lp_ctx, model_ops, wcard[i], ldap_service);
- if (!NT_STATUS_IS_OK(status)) goto failed;
+ status = add_socket(task, task->lp_ctx, task->model_ops,
+ wcard[i], ldap_service);
+ if (NT_STATUS_IS_OK(status)) {
+ num_binds++;
+ }
}
talloc_free(wcard);
+ if (num_binds == 0) {
+ status = NT_STATUS_UNSUCCESSFUL;
+ goto failed;
+ }
}
ldapi_path = lpcfg_private_path(ldap_service, task->lp_ctx, "ldapi");
if (!ldapi_path) {
+ status = NT_STATUS_UNSUCCESSFUL;
goto failed;
}
status = stream_setup_socket(task, task->event_ctx, task->lp_ctx,
- model_ops, &ldap_stream_nonpriv_ops,
- "unix", ldapi_path, NULL,
+ task->model_ops, &ldapi_stream_nonpriv_ops,
+ "unix", ldapi_path, NULL,
lpcfg_socket_options(task->lp_ctx),
- ldap_service);
+ ldap_service, task->process_context);
talloc_free(ldapi_path);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0,("ldapsrv failed to bind to %s - %s\n",
- ldapi_path, nt_errstr(status)));
+ DBG_ERR("ldapsrv failed to bind to %s - %s\n",
+ ldapi_path, nt_errstr(status));
}
#ifdef WITH_LDAPI_PRIV_SOCKET
priv_dir = lpcfg_private_path(ldap_service, task->lp_ctx, "ldap_priv");
if (priv_dir == NULL) {
+ status = NT_STATUS_UNSUCCESSFUL;
goto failed;
}
/*
* Make sure the directory for the privileged ldapi socket exists, and
* is of the correct permissions
*/
- if (!directory_create_or_exist(priv_dir, geteuid(), 0750)) {
+ if (!directory_create_or_exist(priv_dir, 0750)) {
task_server_terminate(task, "Cannot create ldap "
"privileged ldapi directory", true);
- return;
+ return NT_STATUS_UNSUCCESSFUL;
}
ldapi_path = talloc_asprintf(ldap_service, "%s/ldapi", priv_dir);
talloc_free(priv_dir);
if (ldapi_path == NULL) {
+ status = NT_STATUS_NO_MEMORY;
goto failed;
}
status = stream_setup_socket(task, task->event_ctx, task->lp_ctx,
- model_ops, &ldap_stream_priv_ops,
+ task->model_ops, &ldapi_stream_priv_ops,
"unix", ldapi_path, NULL,
lpcfg_socket_options(task->lp_ctx),
- ldap_service);
+ ldap_service,
+ task->process_context);
talloc_free(ldapi_path);
if (!NT_STATUS_IS_OK(status)) {
- DEBUG(0,("ldapsrv failed to bind to %s - %s\n",
- ldapi_path, nt_errstr(status)));
+ DBG_ERR("ldapsrv failed to bind to %s - %s\n",
+ ldapi_path, nt_errstr(status));
}
#endif
- return;
+
+ /* register the server */
+ irpc_add_name(task->msg_ctx, "ldap_server");
+
+ task->private_data = ldap_service;
+
+ return NT_STATUS_OK;
failed:
task_server_terminate(task, "Failed to startup ldap server task", true);
+ return status;
+}
+
+/*
+ * Open a database to be later used by LDB wrap code (although it should be
+ * plumbed through correctly eventually).
+ */
+static void ldapsrv_post_fork(struct task_server *task, struct process_details *pd)
+{
+ struct ldapsrv_service *ldap_service =
+ talloc_get_type_abort(task->private_data, struct ldapsrv_service);
+
+ /*
+ * As ldapsrv_before_loop() may changed the values for the parent loop
+ * we need to adjust the pointers to the correct value in the child
+ */
+ ldap_service->lp_ctx = task->lp_ctx;
+ ldap_service->current_ev = task->event_ctx;
+ ldap_service->current_msg = task->msg_ctx;
+
+ ldap_service->sam_ctx = samdb_connect(ldap_service,
+ ldap_service->current_ev,
+ ldap_service->lp_ctx,
+ system_session(ldap_service->lp_ctx),
+ NULL,
+ 0);
+ if (ldap_service->sam_ctx == NULL) {
+ task_server_terminate(task, "Cannot open system session LDB",
+ true);
+ return;
+ }
}
+static void ldapsrv_before_loop(struct task_server *task)
+{
+ struct ldapsrv_service *ldap_service =
+ talloc_get_type_abort(task->private_data, struct ldapsrv_service);
+ NTSTATUS status;
+
+ if (ldap_service->sam_ctx != NULL) {
+ /*
+ * Make sure the values are still the same
+ * as set in ldapsrv_post_fork()
+ */
+ SMB_ASSERT(task->lp_ctx == ldap_service->lp_ctx);
+ SMB_ASSERT(task->event_ctx == ldap_service->current_ev);
+ SMB_ASSERT(task->msg_ctx == ldap_service->current_msg);
+ } else {
+ /*
+ * We need to adjust the pointers to the correct value
+ * in the parent loop.
+ */
+ ldap_service->lp_ctx = task->lp_ctx;
+ ldap_service->current_ev = task->event_ctx;
+ ldap_service->current_msg = task->msg_ctx;
+ }
+
+ status = imessaging_register(ldap_service->current_msg,
+ ldap_service,
+ MSG_RELOAD_TLS_CERTIFICATES,
+ ldap_reload_certs);
+ if (!NT_STATUS_IS_OK(status)) {
+ task_server_terminate(task, "Cannot register ldap_reload_certs",
+ true);
+ return;
+ }
+}
+
+/*
+ * Check the size of an ldap request packet.
+ *
+ * For authenticated connections the maximum packet size is controlled by
+ * the smb.conf parameter "ldap max authenticated request size"
+ *
+ * For anonymous connections the maximum packet size is controlled by
+ * the smb.conf parameter "ldap max anonymous request size"
+ */
+static int ldapsrv_check_packet_size(
+ struct ldapsrv_connection *conn,
+ size_t size)
+{
+ bool is_anonymous = false;
+ size_t max_size = 0;
+
+ max_size = lpcfg_ldap_max_anonymous_request_size(conn->lp_ctx);
+ if (size <= max_size) {
+ return LDAP_SUCCESS;
+ }
+
+ /*
+ * Request is larger than the maximum unauthenticated request size.
+ * As this code is called frequently we avoid calling
+ * security_token_is_anonymous if possible
+ */
+ if (conn->session_info != NULL &&
+ conn->session_info->security_token != NULL) {
+ is_anonymous = security_token_is_anonymous(
+ conn->session_info->security_token);
+ }
+
+ if (is_anonymous) {
+ DBG_WARNING(
+ "LDAP request size (%zu) exceeds (%zu)\n",
+ size,
+ max_size);
+ return LDAP_UNWILLING_TO_PERFORM;
+ }
+
+ max_size = lpcfg_ldap_max_authenticated_request_size(conn->lp_ctx);
+ if (size > max_size) {
+ DBG_WARNING(
+ "LDAP request size (%zu) exceeds (%zu)\n",
+ size,
+ max_size);
+ return LDAP_UNWILLING_TO_PERFORM;
+ }
+ return LDAP_SUCCESS;
+
+}
+
+/*
+ * Check that the blob contains enough data to be a valid packet
+ * If there is a packet header check the size to ensure that it does not
+ * exceed the maximum sizes.
+ *
+ */
+static NTSTATUS ldapsrv_packet_check(
+ struct tstream_context *stream,
+ void *private_data,
+ DATA_BLOB blob,
+ size_t *packet_size)
+{
+ NTSTATUS ret;
+ struct ldapsrv_connection *conn = private_data;
+ int result = LDB_SUCCESS;
+
+ ret = ldap_full_packet(stream, private_data, blob, packet_size);
+ if (!NT_STATUS_IS_OK(ret)) {
+ return ret;
+ }
+ result = ldapsrv_check_packet_size(conn, *packet_size);
+ if (result != LDAP_SUCCESS) {
+ return NT_STATUS_LDAP(result);
+ }
+ return NT_STATUS_OK;
+}
-NTSTATUS server_service_ldap_init(void)
+NTSTATUS server_service_ldap_init(TALLOC_CTX *ctx)
{
- return register_server_service("ldap", ldapsrv_task_init);
+ static const struct service_details details = {
+ .inhibit_fork_on_accept = false,
+ .inhibit_pre_fork = false,
+ .task_init = ldapsrv_task_init,
+ .post_fork = ldapsrv_post_fork,
+ .before_loop = ldapsrv_before_loop,
+ };
+ return register_server_service(ctx, "ldap", &details);
}
git.samba.org / samba.git / blobdiff