/*
	 * Copyright 2008-2026 the Pacemaker project contributors
	 *
	 * The version control history for this file may have further details.
	 *
	 * This source code is licensed under the GNU Lesser General Public License
	 * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
	 */
	
	#include <crm_internal.h>
	
	#include <errno.h>                  // ENOTCONN, EPROTO, EAGAIN
	#include <stdbool.h>                // false, bool, true
	#include <stdlib.h>                 // NULL, free, calloc
	#include <string.h>                 // strdup
	#include <sys/socket.h>             // shutdown, SHUT_RDWR
	#include <time.h>                   // time, time_t
	#include <unistd.h>                 // close
	
	#include <glib.h>                   // gboolean, g_*, G_*
	#include <gnutls/gnutls.h>          // gnutls_deinit, gnutls_bye
	#include <libxml/tree.h>            // xmlNode
	#include <qb/qblog.h>               // QB_XS
	
	#include <crm/cib.h>                // cib_t, cib_remote_new
	#include <crm/cib/internal.h>       // cib__create_op, cib__extend_transaction
	#include <crm/common/mainloop.h>    // mainloop_fd_callbacks
	#include <crm/common/results.h>     // pcmk_rc_str, pcmk_rc_*
	#include <crm/common/xml.h>         // PCMK_XA_*,
	#include <crm/crm.h>                // CRM_OP_REGISTER, crm_system_name
	
	// GnuTLS handshake timeout in seconds
	#define TLS_HANDSHAKE_TIMEOUT 5
	
	static pcmk__tls_t *tls = NULL;
	
	#include <arpa/inet.h>
	
	typedef struct {
	    int port;
	    char *server;
	    char *user;
	    char *passwd;
	    gboolean encrypted;
	    pcmk__remote_t command;
	    pcmk__remote_t callback;
	    pcmk__output_t *out;
	    time_t start_time;
	    int timeout_sec;
	} cib_remote_opaque_t;
	
	static bool
	ack_is_failure(const xmlNode *reply)
	{
	    int status = 0;
	
	    pcmk__xe_get_int(reply, PCMK_XA_STATUS, &status);
	    if (status != CRM_EX_OK) {
	        pcmk__err("Received error response from based: %s", crm_exit_str(status));
	        return true;
	    }
	
	    return false;
	}
	
	static int
	cib_remote_perform_op(cib_t *cib, const char *op, const char *host,
	                      const char *section, xmlNode *data,
	                      xmlNode **output_data, int call_options,
	                      const char *user_name)
	{
	    int rc;
	    int remaining_time = 0;
	    time_t start_time;
	
	    xmlNode *op_msg = NULL;
	    xmlNode *op_reply = NULL;
	
	    cib_remote_opaque_t *private = cib->variant_opaque;
	
	    if (cib->state == cib_disconnected) {
	        return -ENOTCONN;
	    }
	
	    if (output_data != NULL) {
	        *output_data = NULL;
	    }
	
	    if (op == NULL) {
	        pcmk__err("No operation specified");
	        return -EINVAL;
	    }
	
	    rc = cib__create_op(cib, op, host, section, data, call_options, user_name,
	                        NULL, &op_msg);
	    rc = pcmk_rc2legacy(rc);
	    if (rc != pcmk_ok) {
	        return rc;
	    }
	
	    if (pcmk__is_set(call_options, cib_transaction)) {
	        rc = cib__extend_transaction(cib, op_msg);
	        pcmk__xml_free(op_msg);
	        return pcmk_rc2legacy(rc);
	    }
	
	    pcmk__trace("Sending %s message to the CIB manager", op);
	    if (!pcmk__is_set(call_options, cib_sync_call)) {
	        pcmk__remote_send_xml(&private->callback, op_msg);
	    } else {
	        pcmk__remote_send_xml(&private->command, op_msg);
	    }
	    pcmk__xml_free(op_msg);
	
	    if (pcmk__is_set(call_options, cib_discard_reply)) {
	        pcmk__trace("Discarding reply");
	        return pcmk_ok;
	    }
	
	    if (!pcmk__is_set(call_options, cib_sync_call)) {
	        return cib->call_id;
	    }
	
	    pcmk__trace("Waiting for a synchronous reply");
	
	    start_time = time(NULL);
	    remaining_time = cib->call_timeout ? cib->call_timeout : 60;
	
	    rc = pcmk_rc_ok;
	    while (remaining_time > 0 && (rc != ENOTCONN)) {
	        int reply_id = -1;
	        int msg_id = cib->call_id;
	
	        rc = pcmk__read_remote_message(&private->command,
	                                       remaining_time * 1000);
	        op_reply = pcmk__remote_message_xml(&private->command);
	
	        if (!op_reply) {
	            break;
	        }
	
	        pcmk__xe_get_int(op_reply, PCMK__XA_CIB_CALLID, &reply_id);
	
	        if (reply_id == msg_id) {
	            break;
	
	        } else if (reply_id < msg_id) {
	            pcmk__debug("Received old reply: %d (wanted %d)", reply_id, msg_id);
	            pcmk__log_xml_trace(op_reply, "Old reply");
	
	        } else if ((reply_id - 10000) > msg_id) {
	            /* wrap-around case */
	            pcmk__debug("Received old reply: %d (wanted %d)", reply_id, msg_id);
	            pcmk__log_xml_trace(op_reply, "Old reply");
	        } else {
	            pcmk__err("Received a __future__ reply: %d (wanted %d)", reply_id,
	                      msg_id);
	        }
	
	        g_clear_pointer(&op_reply, pcmk__xml_free);
	
	        /* wasn't the right reply, try and read some more */
	        remaining_time = time(NULL) - start_time;
	    }
	
	    if (rc == ENOTCONN) {
	        pcmk__err("Disconnected while waiting for reply");
	        return -ENOTCONN;
	    }
	
	    if (op_reply == NULL) {
	        pcmk__err("No reply message - empty");
	        return -ENOMSG;
	    }
	
	    /* The only reason we can receive an ACK here is if based_ipc_dispatch ->
	     * pcmk__client_data2xml processed something that's not valid XML.
	     * based_ipc_dispatch does not return ACK, unlike other daemons.
	     */
	    if (pcmk__xe_is(op_reply, PCMK__XE_ACK) && ack_is_failure(op_reply)) {
	        pcmk__xml_free(op_reply);
	        return -EPROTO;
	    }
	
	    pcmk__trace("Synchronous reply received");
	
	    /* Start processing the reply... */
	    if (pcmk__xe_get_int(op_reply, PCMK__XA_CIB_RC, &rc) != pcmk_rc_ok) {
	        rc = -EPROTO;
	    }
	
	    if (rc == pcmk_ok || rc == -EPERM) {
	        pcmk__log_xml_debug(op_reply, "passed");
	
	    } else {
	        pcmk__err("Call failed: %s", pcmk_strerror(rc));
	        pcmk__log_xml_warn(op_reply, "failed");
	    }
	
	    if (output_data == NULL) {
	        /* do nothing more */
	
	    } else if (!pcmk__is_set(call_options, cib_discard_reply)) {
	        xmlNode *tmp = cib__get_calldata(op_reply);
	
	        if (tmp == NULL) {
	            pcmk__trace("No output in reply to \"%s\" command %d", op,
	                        (cib->call_id - 1));
	        } else {
	            *output_data = pcmk__xml_copy(NULL, tmp);
	        }
	    }
	
	    pcmk__xml_free(op_reply);
	
	    return rc;
	}
	
	static int
	cib_remote_callback_dispatch(void *user_data)
	{
	    int rc;
	    cib_t *cib = user_data;
	    cib_remote_opaque_t *private = cib->variant_opaque;
	
	    xmlNode *msg = NULL;
	    const char *type = NULL;
	
	    /* If start time is 0, we've previously handled a complete message and this
	     * connection is being reused for a new message.  Reset the start_time,
	     * giving this new message timeout_sec from now to complete.
	     */
	    if (private->start_time == 0) {
	        private->start_time = time(NULL);
	    }
	
	    rc = pcmk__read_available_remote_data(&private->callback);
	    switch (rc) {
	        case pcmk_rc_ok:
	            /* We have the whole message so process it */
	            break;
	
	        case EAGAIN:
	            /* Have we timed out? */
	            if (time(NULL) >= private->start_time + private->timeout_sec) {
	                pcmk__info("Error reading from CIB manager connection: %s",
	                           pcmk_rc_str(ETIME));
	                return -1;
	            }
	
	            /* We haven't read the whole message yet */
	            return 0;
	
	        default:
	            /* Error */
	            pcmk__info("Error reading from CIB manager connection: %s",
	                       pcmk_rc_str(rc));
	            return -1;
	    }
	
	    msg = pcmk__remote_message_xml(&private->callback);
	    if (msg == NULL) {
	        private->start_time = 0;
	        return 0;
	    }
	
	    type = pcmk__xe_get(msg, PCMK__XA_T);
	
	    pcmk__trace("Activating %s callbacks...", type);
	
	    if (pcmk__str_eq(type, PCMK__VALUE_CIB, pcmk__str_none)) {
	        cib_native_callback(cib, msg, 0, 0);
	    } else if (pcmk__str_eq(type, PCMK__VALUE_CIB_NOTIFY, pcmk__str_none)) {
	        g_list_foreach(cib->notify_list, cib_native_notify, msg);
	    } else {
	        pcmk__err("Unknown message type: %s", type);
	    }
	
	    pcmk__xml_free(msg);
	    private->start_time = 0;
	    return 0;
	}
	
	static int
	cib_remote_command_dispatch(void *user_data)
	{
	    int rc;
	    cib_t *cib = user_data;
	    cib_remote_opaque_t *private = cib->variant_opaque;
	
	    /* See cib_remote_callback_dispatch */
	    if (private->start_time == 0) {
	        private->start_time = time(NULL);
	    }
	
	    rc = pcmk__read_available_remote_data(&private->command);
	    if (rc == EAGAIN) {
	        /* Have we timed out? */
	        if (time(NULL) >= private->start_time + private->timeout_sec) {
	            pcmk__info("Error reading from CIB manager connection: %s",
	                       pcmk_rc_str(ETIME));
	            return -1;
	        }
	
	        /* We haven't read the whole message yet */
	        return 0;
	    }
	
	    g_clear_pointer(&private->command.buffer, free);
	    pcmk__err("Received late reply for remote cib connection, discarding");
	
	    if (rc != pcmk_rc_ok) {
	        pcmk__info("Error reading from CIB manager connection: %s",
	                   pcmk_rc_str(rc));
	        return -1;
	    }
	
	    private->start_time = 0;
	    return 0;
	}
	
	static int
	cib_tls_close(cib_t *cib)
	{
	    cib_remote_opaque_t *private = cib->variant_opaque;
	
	    if (private->encrypted) {
	        if (private->command.tls_session) {
	            gnutls_bye(private->command.tls_session, GNUTLS_SHUT_RDWR);
	            gnutls_deinit(private->command.tls_session);
	        }
	
	        if (private->callback.tls_session) {
	            gnutls_bye(private->callback.tls_session, GNUTLS_SHUT_RDWR);
	            gnutls_deinit(private->callback.tls_session);
	        }
	
	        private->command.tls_session = NULL;
	        private->callback.tls_session = NULL;
	        g_clear_pointer(&tls, pcmk__free_tls);
	    }
	
	    if (private->command.tcp_socket >= 0) {
	        shutdown(private->command.tcp_socket, SHUT_RDWR);       /* no more receptions */
	        close(private->command.tcp_socket);
	    }
	    if (private->callback.tcp_socket >= 0) {
	        shutdown(private->callback.tcp_socket, SHUT_RDWR);      /* no more receptions */
	        close(private->callback.tcp_socket);
	    }
	    private->command.tcp_socket = -1;
	    private->callback.tcp_socket = -1;
	
	    g_clear_pointer(&private->command.buffer, free);
	    g_clear_pointer(&private->callback.buffer, free);
	
	    return 0;
	}
	
	static void
	cib_remote_connection_destroy(void *user_data)
	{
	    pcmk__err("Connection destroyed");
	    cib_tls_close(user_data);
	}
	
	static int
	cib_setup_tls(pcmk__remote_t *connection, const char *server, int port,
	              const char *user)
	{
	    int rc = pcmk_rc_ok;
	    int tls_rc = GNUTLS_E_SUCCESS;
	    bool have_psk = false;
	    const char *key_location = getenv("CIB_key_file");
	
	    /* X509 certificates take precedence over PSK in pcmk__init_tls,
	     * so don't perform any of the following (potentially noisy) checks
	     * if we don't care about their results.
	     */
	    if (!pcmk__x509_enabled()) {
	        bool file_exists = false;
	
	        if (key_location != NULL) {
	            have_psk = pcmk__cred_file_useable(key_location, &file_exists);
	        }
	
	        if (!have_psk && file_exists) {
	            /* The credential file exists but doesn't have the right owner
	             * or permissions.  Don't fall back to anonymous on config
	             * errors.
	             */
	            pcmk__err("Remote CIB session creation for %s:%d failed",
	                      server, port);
	            rc = EACCES;
	            goto done;
	        }
	
	        if (!have_psk) {
	            /* The credential file does not exist at all, so fall back
	             * to anonymous auth.
	             *
	             * @COMPAT Remove fallback to anonymous authentication
	             */
	            pcmk__warn("Falling back to anonymous authentication for remote "
	                       "CIB connections");
	        }
	    }
	
	    rc = pcmk__init_tls(&tls, false, have_psk);
	    if (rc != pcmk_rc_ok) {
	        goto done;
	    }
	
	    if (tls->cred_type == GNUTLS_CRD_PSK) {
	        gnutls_datum_t psk_key = { NULL, 0 };
	
	        rc = pcmk__load_key(key_location, &psk_key, false);
	
	        if (rc != pcmk_rc_ok) {
	            pcmk__warn("Could not read remote CIB key from %s: %s",
	                       key_location, pcmk_rc_str(rc));
	            goto done;
	        }
	
	        pcmk__tls_client_add_psk_key(tls, user, &psk_key, false);
	        gnutls_free(psk_key.data);
	    }
	
	    connection->tls_session = pcmk__new_tls_session(tls, connection->tcp_socket);
	    if (connection->tls_session == NULL) {
	        rc = ENOTCONN;
	        goto done;
	    }
	
	    rc = pcmk__tls_client_handshake(connection, TLS_HANDSHAKE_TIMEOUT, &tls_rc);
	    if (rc != pcmk_rc_ok) {
	        const char *msg = NULL;
	
	        if (rc == EPROTO) {
	            msg = gnutls_strerror(tls_rc);
	        } else {
	            msg = pcmk_rc_str(rc);
	        }
	
	        pcmk__err("Remote CIB session creation for %s:%d failed: %s",
	                  server, port, msg);
	        g_clear_pointer(&connection->tls_session, gnutls_deinit);
	    }
	
	done:
	    return rc;
	}
	
	static int
	cib_tls_signon(cib_t *cib, pcmk__remote_t *connection, gboolean event_channel)
	{
	    cib_remote_opaque_t *private = cib->variant_opaque;
	    int rc;
	
	    xmlNode *answer = NULL;
	    xmlNode *login = NULL;
	    const char *msg_type = NULL;
	    const char *tmp_ticket = NULL;
	
	    static struct mainloop_fd_callbacks cib_fd_callbacks = { 0, };
	
	    cib_fd_callbacks.dispatch =
	        event_channel ? cib_remote_callback_dispatch : cib_remote_command_dispatch;
	    cib_fd_callbacks.destroy = cib_remote_connection_destroy;
	
	    connection->tcp_socket = -1;
	    connection->tls_session = NULL;
	    rc = pcmk__connect_remote(private->server, private->port, 0, NULL,
	                              &connection->tcp_socket, NULL, NULL);
	    if (rc != pcmk_rc_ok) {
	        pcmk__info("Remote connection to %s:%d failed: %s " QB_XS " rc=%d",
	                   private->server, private->port, pcmk_rc_str(rc), rc);
	        return -ENOTCONN;
	    }
	
	    if (private->encrypted) {
	        rc = cib_setup_tls(connection, private->server, private->port,
	                           private->user);
	
	        if (rc != pcmk_rc_ok) {
	            if (connection->tls_session == NULL) {
	                cib_tls_close(cib);
	            }
	
	            return -rc;
	        }
	
	    } else {
	        pcmk__warn("Connecting to remote CIB without encryption. This is "
	                   "insecure and will be removed in a future release. Use "
	                   "the CIB_encrypted=true environment variable instead.");
	    }
	
	    /* Now that the handshake is done, see if any client TLS certificate is
	     * close to its expiration date and log if so.  If a TLS certificate is not
	     * in use, this function will just return so we don't need to check for the
	     * session type here.
	     */
	    pcmk__tls_check_cert_expiration(connection->tls_session);
	
	    /* login to server */
	    login = pcmk__xe_create(NULL, PCMK__XE_CIB_COMMAND);
	    pcmk__xe_set_props(login,
	                       PCMK_XA_OP, "authenticate",
	                       PCMK_XA_USER, private->user,
	                       PCMK__XA_PASSWORD, private->passwd,
	                       PCMK__XA_HIDDEN, PCMK__VALUE_PASSWORD,
	                       NULL);
	
	    pcmk__remote_send_xml(connection, login);
	    pcmk__xml_free(login);
	
	    rc = pcmk_ok;
	    if (pcmk__read_remote_message(connection, -1) == ENOTCONN) {
	        rc = -ENOTCONN;
	    }
	
	    answer = pcmk__remote_message_xml(connection);
	
	    if (answer == NULL) {
	        rc = -EPROTO;
	        goto done;
	    }
	
	    /* The only reason we can receive an ACK here is if based_ipc_dispatch ->
	     * pcmk__client_data2xml processed something that's not valid XML.
	     * based_ipc_dispatch does not return ACK, unlike other daemons.
	     */
	    if (pcmk__xe_is(answer, PCMK__XE_ACK) && ack_is_failure(answer)) {
	        rc = -EPROTO;
	        goto done;
	    }
	
	    pcmk__log_xml_trace(answer, "reg-reply");
	
	    /* grab the token */
	    msg_type = pcmk__xe_get(answer, PCMK__XA_CIB_OP);
	    tmp_ticket = pcmk__xe_get(answer, PCMK__XA_CIB_CLIENTID);
	
	    if (!pcmk__str_eq(msg_type, CRM_OP_REGISTER, pcmk__str_none)) {
	        pcmk__err("Invalid registration message: %s", msg_type);
	        rc = -EPROTO;
	
	    } else if (tmp_ticket == NULL) {
	        rc = -EPROTO;
	
	    } else {
	        connection->token = strdup(tmp_ticket);
	    }
	
	done:
	    g_clear_pointer(&answer, pcmk__xml_free);
	
	    if (rc != 0) {
	        cib_tls_close(cib);
	        return rc;
	    }
	
	    pcmk__trace("remote client connection established");
	    private->timeout_sec = 60;
	    connection->source = mainloop_add_fd("cib-remote", G_PRIORITY_HIGH,
	                                         connection->tcp_socket, cib,
	                                         &cib_fd_callbacks);
	    return rc;
	}
	
	/*!
	 * \internal
	 * \brief Sign on a native client to the CIB API
	 *
	 * \param[in,out] cib   CIB connection (client)
	 * \param[in]     name  Ignored
	 * \param[in]     type  Ignored
	 */
	static int
	cib_remote_signon(cib_t *cib, const char *name, enum cib_conn_type type)
	{
	    int rc = pcmk_ok;
	    cib_remote_opaque_t *private = cib->variant_opaque;
	
	    name = pcmk__s(crm_system_name, "client");
	
	    if (private->passwd == NULL) {
	        if (private->out == NULL) {
	            /* If no pcmk__output_t is set, just assume that a text prompt
	             * is good enough.
	             */
	            pcmk__text_prompt("Password", false, &private->passwd);
	        } else {
	            private->out->prompt("Password", false, &private->passwd);
	        }
	    }
	
	    if (private->server == NULL || private->user == NULL) {
	        rc = -EINVAL;
	        goto done;
	    }
	
	    rc = cib_tls_signon(cib, &private->command, false);
	    if (rc != pcmk_ok) {
	        goto done;
	    }
	
	    rc = cib_tls_signon(cib, &private->callback, true);
	
	done:
	    if (rc == pcmk_ok) {
	        pcmk__info("Opened connection to %s:%d for %s", private->server,
	                   private->port, name);
	        cib->state = cib_connected_command;
	
	    } else {
	        pcmk__info("Connection to %s:%d for %s failed: %s\n", private->server,
	                   private->port, name, pcmk_strerror(rc));
	    }
	
	    return rc;
	}
	
	static int
	cib_remote_signoff(cib_t *cib)
	{
	    int rc = pcmk_ok;
	
	    pcmk__debug("Disconnecting from the CIB manager");
	    cib_tls_close(cib);
	
	    cib->cmds->end_transaction(cib, false, cib_none);
	    cib->state = cib_disconnected;
	
	    return rc;
	}
	
	static int
	cib_remote_free(cib_t *cib)
	{
	    int rc = pcmk_ok;
	
	    pcmk__warn("Freeing CIB");
	    if (cib->state != cib_disconnected) {
	        rc = cib_remote_signoff(cib);
	        if (rc == pcmk_ok) {
	            cib_remote_opaque_t *private = cib->variant_opaque;
	
	            free(private->server);
	            free(private->user);
	            free(private->passwd);
	            free(cib->cmds);
	            free(cib->user);
	            free(private);
	            free(cib);
	        }
	    }
	
	    return rc;
	}
	
	static int
	cib_remote_register_notification(cib_t * cib, const char *callback, int enabled)
	{
	    xmlNode *notify_msg = pcmk__xe_create(NULL, PCMK__XE_CIB_COMMAND);
	    cib_remote_opaque_t *private = cib->variant_opaque;
	
	    pcmk__xe_set(notify_msg, PCMK__XA_CIB_OP, PCMK__VALUE_CIB_NOTIFY);
	    pcmk__xe_set(notify_msg, PCMK__XA_CIB_NOTIFY_TYPE, callback);
	    pcmk__xe_set_int(notify_msg, PCMK__XA_CIB_NOTIFY_ACTIVATE, enabled);
	    pcmk__remote_send_xml(&private->callback, notify_msg);
	    pcmk__xml_free(notify_msg);
	    return pcmk_ok;
	}
	
	static int
	cib_remote_set_connection_dnotify(cib_t *cib, void (*dnotify)(void *user_data))
	{
	    return -EPROTONOSUPPORT;
	}
	
	/*!
	 * \internal
	 * \brief Get the given CIB connection's unique client identifiers
	 *
	 * These can be used to check whether this client requested the action that
	 * triggered a CIB notification.
	 *
	 * \param[in]  cib       CIB connection
	 * \param[out] async_id  If not \p NULL, where to store asynchronous client ID
	 * \param[out] sync_id   If not \p NULL, where to store synchronous client ID
	 *
	 * \return Legacy Pacemaker return code (specifically, \p pcmk_ok)
	 *
	 * \note This is the \p cib_remote variant implementation of
	 *       \p cib_api_operations_t:client_id().
	 * \note The client IDs are assigned during CIB sign-on.
	 */
	static int
	cib_remote_client_id(const cib_t *cib, const char **async_id,
	                     const char **sync_id)
	{
	    cib_remote_opaque_t *private = cib->variant_opaque;
	
	    if (async_id != NULL) {
	        // private->callback is the channel for async requests
	        *async_id = private->callback.token;
	    }
	    if (sync_id != NULL) {
	        // private->command is the channel for sync requests
	        *sync_id = private->command.token;
	    }
	    return pcmk_ok;
	}
	
	cib_t *
	cib_remote_new(const char *server, const char *user, const char *passwd, int port,
	               gboolean encrypted)
	{
	    cib_remote_opaque_t *private = NULL;

	    cib_t *cib = cib_new_variant();
	

	    if (cib == NULL) {
	        return NULL;
	    }
	
	    private = calloc(1, sizeof(cib_remote_opaque_t));
	

	    if (private == NULL) {

	        free(cib);
	        return NULL;
	    }
	
	    cib->variant = cib_remote;
	    cib->variant_opaque = private;
	
	    private->server = pcmk__str_copy(server);
	    private->user = pcmk__str_copy(user);
	    private->passwd = pcmk__str_copy(passwd);
	    private->port = port;
	    private->encrypted = encrypted;
	
	    /* assign variant specific ops */
	    cib->delegate_fn = cib_remote_perform_op;
	    cib->cmds->signon = cib_remote_signon;
	    cib->cmds->signoff = cib_remote_signoff;
	    cib->cmds->free = cib_remote_free;
	    cib->cmds->register_notification = cib_remote_register_notification;
	    cib->cmds->set_connection_dnotify = cib_remote_set_connection_dnotify;
	
	    cib->cmds->client_id = cib_remote_client_id;
	
	    return cib;
	}
	
	void
	cib__set_output(cib_t *cib, pcmk__output_t *out)
	{
	    cib_remote_opaque_t *private;
	
	    if (cib->variant != cib_remote) {
	        return;
	    }
	
	    private = cib->variant_opaque;
	    private->out = out;
	}