e32d354f75
4005. [func] The buffer used for returning text from rndc commands is now dynamically resizable, allowing arbitrarily large amounts of text to be sent back to the client. (Prior to this change, it was possible for the output of "rndc tsig-list" to be truncated.) [RT #37731]
230 lines
8.1 KiB
C
230 lines
8.1 KiB
C
/*
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* Copyright (C) 2004-2007, 2009-2014 Internet Systems Consortium, Inc. ("ISC")
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* Copyright (C) 2001-2003 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: control.c,v 1.49 2012/01/31 23:47:31 tbox Exp $ */
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/*! \file */
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#include <config.h>
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#include <isc/app.h>
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#include <isc/event.h>
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#include <isc/mem.h>
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#include <isc/string.h>
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#include <isc/timer.h>
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#include <isc/util.h>
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#include <dns/result.h>
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#include <isccc/alist.h>
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#include <isccc/cc.h>
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#include <isccc/result.h>
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#include <named/control.h>
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#include <named/log.h>
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#include <named/os.h>
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#include <named/server.h>
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#ifdef HAVE_LIBSCF
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#include <named/ns_smf_globals.h>
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#endif
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static isc_boolean_t
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command_compare(const char *text, const char *command) {
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unsigned int commandlen = strlen(command);
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if (strncasecmp(text, command, commandlen) == 0 &&
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(text[commandlen] == '\0' ||
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text[commandlen] == ' ' ||
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text[commandlen] == '\t'))
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return (ISC_TRUE);
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return (ISC_FALSE);
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}
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/*%
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* This function is called to process the incoming command
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* when a control channel message is received.
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*/
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isc_result_t
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ns_control_docommand(isccc_sexpr_t *message, isc_buffer_t **text) {
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isccc_sexpr_t *data;
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char *command = NULL;
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isc_result_t result;
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int log_level;
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#ifdef HAVE_LIBSCF
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ns_smf_want_disable = 0;
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#endif
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data = isccc_alist_lookup(message, "_data");
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if (data == NULL) {
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/*
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* No data section.
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*/
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return (ISC_R_FAILURE);
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}
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result = isccc_cc_lookupstring(data, "type", &command);
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if (result != ISC_R_SUCCESS) {
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/*
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* We have no idea what this is.
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*/
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return (result);
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}
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/*
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* Compare the 'command' parameter against all known control commands.
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*/
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if (command_compare(command, NS_COMMAND_NULL) ||
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command_compare(command, NS_COMMAND_STATUS)) {
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log_level = ISC_LOG_DEBUG(1);
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} else {
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log_level = ISC_LOG_INFO;
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}
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isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
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NS_LOGMODULE_CONTROL, log_level,
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"received control channel command '%s'",
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command);
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if (command_compare(command, NS_COMMAND_RELOAD)) {
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result = ns_server_reloadcommand(ns_g_server, command, text);
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} else if (command_compare(command, NS_COMMAND_RECONFIG)) {
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result = ns_server_reconfigcommand(ns_g_server, command);
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} else if (command_compare(command, NS_COMMAND_REFRESH)) {
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result = ns_server_refreshcommand(ns_g_server, command, text);
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} else if (command_compare(command, NS_COMMAND_RETRANSFER)) {
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result = ns_server_retransfercommand(ns_g_server,
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command, text);
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} else if (command_compare(command, NS_COMMAND_HALT)) {
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#ifdef HAVE_LIBSCF
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/*
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* If we are managed by smf(5), AND in chroot, then
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* we cannot connect to the smf repository, so just
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* return with an appropriate message back to rndc.
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*/
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if (ns_smf_got_instance == 1 && ns_smf_chroot == 1) {
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result = ns_smf_add_message(text);
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return (result);
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}
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/*
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* If we are managed by smf(5) but not in chroot,
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* try to disable ourselves the smf way.
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*/
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if (ns_smf_got_instance == 1 && ns_smf_chroot == 0)
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ns_smf_want_disable = 1;
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/*
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* If ns_smf_got_instance = 0, ns_smf_chroot
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* is not relevant and we fall through to
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* isc_app_shutdown below.
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*/
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#endif
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/* Do not flush master files */
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ns_server_flushonshutdown(ns_g_server, ISC_FALSE);
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ns_os_shutdownmsg(command, *text);
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isc_app_shutdown();
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result = ISC_R_SUCCESS;
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} else if (command_compare(command, NS_COMMAND_STOP)) {
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/*
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* "stop" is the same as "halt" except it does
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* flush master files.
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*/
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#ifdef HAVE_LIBSCF
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if (ns_smf_got_instance == 1 && ns_smf_chroot == 1) {
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result = ns_smf_add_message(text);
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return (result);
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}
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if (ns_smf_got_instance == 1 && ns_smf_chroot == 0)
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ns_smf_want_disable = 1;
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#endif
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ns_server_flushonshutdown(ns_g_server, ISC_TRUE);
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ns_os_shutdownmsg(command, *text);
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isc_app_shutdown();
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result = ISC_R_SUCCESS;
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} else if (command_compare(command, NS_COMMAND_DUMPSTATS)) {
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result = ns_server_dumpstats(ns_g_server);
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} else if (command_compare(command, NS_COMMAND_QUERYLOG)) {
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result = ns_server_togglequerylog(ns_g_server, command);
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} else if (command_compare(command, NS_COMMAND_DUMPDB)) {
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ns_server_dumpdb(ns_g_server, command);
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result = ISC_R_SUCCESS;
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} else if (command_compare(command, NS_COMMAND_SECROOTS)) {
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result = ns_server_dumpsecroots(ns_g_server, command);
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} else if (command_compare(command, NS_COMMAND_TRACE)) {
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result = ns_server_setdebuglevel(ns_g_server, command);
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} else if (command_compare(command, NS_COMMAND_NOTRACE)) {
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ns_g_debuglevel = 0;
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isc_log_setdebuglevel(ns_g_lctx, ns_g_debuglevel);
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result = ISC_R_SUCCESS;
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} else if (command_compare(command, NS_COMMAND_FLUSH)) {
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result = ns_server_flushcache(ns_g_server, command);
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} else if (command_compare(command, NS_COMMAND_FLUSHNAME)) {
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result = ns_server_flushnode(ns_g_server, command, ISC_FALSE);
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} else if (command_compare(command, NS_COMMAND_FLUSHTREE)) {
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result = ns_server_flushnode(ns_g_server, command, ISC_TRUE);
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} else if (command_compare(command, NS_COMMAND_STATUS)) {
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result = ns_server_status(ns_g_server, text);
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} else if (command_compare(command, NS_COMMAND_TSIGLIST)) {
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result = ns_server_tsiglist(ns_g_server, text);
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} else if (command_compare(command, NS_COMMAND_TSIGDELETE)) {
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result = ns_server_tsigdelete(ns_g_server, command, text);
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} else if (command_compare(command, NS_COMMAND_FREEZE)) {
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result = ns_server_freeze(ns_g_server, ISC_TRUE, command,
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text);
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} else if (command_compare(command, NS_COMMAND_UNFREEZE) ||
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command_compare(command, NS_COMMAND_THAW)) {
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result = ns_server_freeze(ns_g_server, ISC_FALSE, command,
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text);
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} else if (command_compare(command, NS_COMMAND_SCAN)) {
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result = ISC_R_SUCCESS;
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ns_server_scan_interfaces(ns_g_server);
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} else if (command_compare(command, NS_COMMAND_SYNC)) {
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result = ns_server_sync(ns_g_server, command, text);
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} else if (command_compare(command, NS_COMMAND_RECURSING)) {
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result = ns_server_dumprecursing(ns_g_server);
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} else if (command_compare(command, NS_COMMAND_TIMERPOKE)) {
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result = ISC_R_SUCCESS;
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isc_timermgr_poke(ns_g_timermgr);
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} else if (command_compare(command, NS_COMMAND_NULL)) {
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result = ISC_R_SUCCESS;
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} else if (command_compare(command, NS_COMMAND_NOTIFY)) {
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result = ns_server_notifycommand(ns_g_server, command, text);
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} else if (command_compare(command, NS_COMMAND_VALIDATION)) {
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result = ns_server_validation(ns_g_server, command, text);
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} else if (command_compare(command, NS_COMMAND_SIGN) ||
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command_compare(command, NS_COMMAND_LOADKEYS)) {
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result = ns_server_rekey(ns_g_server, command, text);
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} else if (command_compare(command, NS_COMMAND_ADDZONE)) {
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result = ns_server_add_zone(ns_g_server, command, text);
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} else if (command_compare(command, NS_COMMAND_DELZONE)) {
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result = ns_server_del_zone(ns_g_server, command, text);
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} else if (command_compare(command, NS_COMMAND_SIGNING)) {
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result = ns_server_signing(ns_g_server, command, text);
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} else if (command_compare(command, NS_COMMAND_ZONESTATUS)) {
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result = ns_server_zonestatus(ns_g_server, command, text);
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} else if (command_compare(command, NS_COMMAND_NTA)) {
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result = ns_server_nta(ns_g_server, command, text);
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} else if (command_compare(command, NS_COMMAND_TESTGEN)) {
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result = ns_server_testgen(command, text);
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} else {
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isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
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NS_LOGMODULE_CONTROL, ISC_LOG_WARNING,
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"unknown control channel command '%s'",
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command);
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result = DNS_R_UNKNOWNCOMMAND;
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}
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return (result);
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}
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