control.c revision dafcb997e390efa4423883dafd100c975c4095d6
/*
* Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
* Copyright (C) 2001-2003 Internet Software Consortium.
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: control.c,v 1.19 2004/03/05 04:57:46 marka Exp $ */
#include <config.h>
#include <string.h>
#include <isc/app.h>
#include <isc/event.h>
#include <isc/mem.h>
#include <isc/timer.h>
#include <isc/util.h>
#include <isccc/alist.h>
#include <isccc/cc.h>
#include <isccc/result.h>
#include <named/control.h>
#include <named/log.h>
#include <named/os.h>
#include <named/server.h>
static isc_boolean_t
command_compare(const char *text, const char *command) {
unsigned int commandlen = strlen(command);
if (strncasecmp(text, command, commandlen) == 0 &&
(text[commandlen] == '\0' ||
text[commandlen] == ' ' ||
text[commandlen] == '\t'))
return (ISC_TRUE);
return (ISC_FALSE);
}
/*
* This function is called to process the incoming command
* when a control channel message is received.
*/
isc_result_t
ns_control_docommand(isccc_sexpr_t *message, isc_buffer_t *text) {
isccc_sexpr_t *data;
char *command;
isc_result_t result;
data = isccc_alist_lookup(message, "_data");
if (data == NULL) {
/*
* No data section.
*/
return (ISC_R_FAILURE);
}
result = isccc_cc_lookupstring(data, "type", &command);
if (result != ISC_R_SUCCESS) {
/*
* We have no idea what this is.
*/
return (result);
}
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_CONTROL, ISC_LOG_DEBUG(1),
"received control channel command '%s'",
command);
/*
* Compare the 'command' parameter against all known control commands.
*/
if (command_compare(command, NS_COMMAND_RELOAD)) {
result = ns_server_reloadcommand(ns_g_server, command, text);
} else if (command_compare(command, NS_COMMAND_RECONFIG)) {
result = ns_server_reconfigcommand(ns_g_server, command);
} else if (command_compare(command, NS_COMMAND_REFRESH)) {
result = ns_server_refreshcommand(ns_g_server, command, text);
} else if (command_compare(command, NS_COMMAND_RETRANSFER)) {
result = ns_server_retransfercommand(ns_g_server, command);
} else if (command_compare(command, NS_COMMAND_HALT)) {
ns_server_flushonshutdown(ns_g_server, ISC_FALSE);
ns_os_shutdownmsg(command, text);
isc_app_shutdown();
result = ISC_R_SUCCESS;
} else if (command_compare(command, NS_COMMAND_STOP)) {
ns_server_flushonshutdown(ns_g_server, ISC_TRUE);
ns_os_shutdownmsg(command, text);
isc_app_shutdown();
result = ISC_R_SUCCESS;
} else if (command_compare(command, NS_COMMAND_DUMPSTATS)) {
result = ns_server_dumpstats(ns_g_server);
} else if (command_compare(command, NS_COMMAND_QUERYLOG)) {
result = ns_server_togglequerylog(ns_g_server);
} else if (command_compare(command, NS_COMMAND_DUMPDB)) {
ns_server_dumpdb(ns_g_server, command);
result = ISC_R_SUCCESS;
} else if (command_compare(command, NS_COMMAND_TRACE)) {
result = ns_server_setdebuglevel(ns_g_server, command);
} else if (command_compare(command, NS_COMMAND_NOTRACE)) {
ns_g_debuglevel = 0;
isc_log_setdebuglevel(ns_g_lctx, ns_g_debuglevel);
result = ISC_R_SUCCESS;
} else if (command_compare(command, NS_COMMAND_FLUSH)) {
result = ns_server_flushcache(ns_g_server, command);
} else if (command_compare(command, NS_COMMAND_FLUSHNAME)) {
result = ns_server_flushname(ns_g_server, command);
} else if (command_compare(command, NS_COMMAND_STATUS)) {
result = ns_server_status(ns_g_server, text);
} else if (command_compare(command, NS_COMMAND_FREEZE)) {
result = ns_server_freeze(ns_g_server, ISC_TRUE, command);
} else if (command_compare(command, NS_COMMAND_UNFREEZE)) {
result = ns_server_freeze(ns_g_server, ISC_FALSE, command);
} else if (command_compare(command, NS_COMMAND_RECURSING)) {
result = ns_server_dumprecursing(ns_g_server);
} else if (command_compare(command, NS_COMMAND_TIMERPOKE)) {
result = ISC_R_SUCCESS;
isc_timermgr_poke(ns_g_timermgr);
} else if (command_compare(command, NS_COMMAND_NULL)) {
result = ISC_R_SUCCESS;
} else {
isc_log_write(ns_g_lctx, NS_LOGCATEGORY_GENERAL,
NS_LOGMODULE_CONTROL, ISC_LOG_WARNING,
"unknown control channel command '%s'",
command);
result = ISC_R_NOTIMPLEMENTED;
}
return (result);
}