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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* SPDX-License-Identifier: MPL-2.0
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, you can obtain one at https://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*! \file */
#include <stdlib.h>
#include <isc/result.h>
#include <isc/util.h>
#include <dns/log.h>
#include <isccfg/log.h>
#include <ns/log.h>
#include <named/log.h>
#ifndef ISC_FACILITY
#define ISC_FACILITY LOG_DAEMON
#endif /* ifndef ISC_FACILITY */
/*%
* When adding a new category, be sure to add the appropriate
* \#define to <named/log.h> and to update the list in
* bin/check/check-tool.c.
*/
static isc_logcategory_t categories[] = { { "", 0 },
{ "unmatched", 0 },
{ NULL, 0 } };
/*%
* When adding a new module, be sure to add the appropriate
* \#define to <dns/log.h>.
*/
static isc_logmodule_t modules[] = {
{ "main", 0 }, { "server", 0 }, { "control", 0 }, { NULL, 0 }
};
isc_result_t
named_log_init(bool safe) {
isc_result_t result;
isc_logconfig_t *lcfg = NULL;
named_g_categories = categories;
named_g_modules = modules;
/*
* Setup a logging context.
*/
isc_log_create(named_g_mctx, &named_g_lctx, &lcfg);
/*
* named-checktool.c:setup_logging() needs to be kept in sync.
*/
isc_log_registercategories(named_g_lctx, named_g_categories);
isc_log_registermodules(named_g_lctx, named_g_modules);
isc_log_setcontext(named_g_lctx);
dns_log_init(named_g_lctx);
dns_log_setcontext(named_g_lctx);
cfg_log_init(named_g_lctx);
ns_log_init(named_g_lctx);
ns_log_setcontext(named_g_lctx);
if (safe) {
named_log_setsafechannels(lcfg);
} else {
named_log_setdefaultchannels(lcfg);
}
result = named_log_setdefaultcategory(lcfg);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
named_log_setdefaultsslkeylogfile(lcfg);
return (ISC_R_SUCCESS);
cleanup:
isc_log_destroy(&named_g_lctx);
isc_log_setcontext(NULL);
dns_log_setcontext(NULL);
return (result);
}
void
named_log_setdefaultchannels(isc_logconfig_t *lcfg) {
isc_logdestination_t destination;
/*
* By default, the logging library makes "default_debug" log to
* stderr. In BIND, we want to override this and log to named.run
* instead, unless the -g option was given.
*/
if (!named_g_logstderr) {
destination.file.stream = NULL;
destination.file.name = "named.run";
destination.file.versions = ISC_LOG_ROLLNEVER;
destination.file.maximum_size = 0;
isc_log_createchannel(lcfg, "default_debug", ISC_LOG_TOFILE,
ISC_LOG_DYNAMIC, &destination,
ISC_LOG_PRINTTIME | ISC_LOG_DEBUGONLY);
}
if (named_g_logfile != NULL) {
destination.file.stream = NULL;
destination.file.name = named_g_logfile;
destination.file.versions = ISC_LOG_ROLLNEVER;
destination.file.maximum_size = 0;
isc_log_createchannel(lcfg, "default_logfile", ISC_LOG_TOFILE,
ISC_LOG_DYNAMIC, &destination,
ISC_LOG_PRINTTIME |
ISC_LOG_PRINTCATEGORY |
ISC_LOG_PRINTLEVEL);
}
#if ISC_FACILITY != LOG_DAEMON
destination.facility = ISC_FACILITY;
isc_log_createchannel(lcfg, "default_syslog", ISC_LOG_TOSYSLOG,
ISC_LOG_INFO, &destination, 0);
#endif /* if ISC_FACILITY != LOG_DAEMON */
/*
* Set the initial debug level.
*/
isc_log_setdebuglevel(named_g_lctx, named_g_debuglevel);
}
void
named_log_setsafechannels(isc_logconfig_t *lcfg) {
isc_logdestination_t destination;
if (!named_g_logstderr) {
isc_log_createchannel(lcfg, "default_debug", ISC_LOG_TONULL,
ISC_LOG_DYNAMIC, NULL, 0);
/*
* Setting the debug level to zero should get the output
* discarded a bit faster.
*/
isc_log_setdebuglevel(named_g_lctx, 0);
} else {
isc_log_setdebuglevel(named_g_lctx, named_g_debuglevel);
}
if (named_g_logfile != NULL) {
destination.file.stream = NULL;
destination.file.name = named_g_logfile;
destination.file.versions = ISC_LOG_ROLLNEVER;
destination.file.maximum_size = 0;
isc_log_createchannel(lcfg, "default_logfile", ISC_LOG_TOFILE,
ISC_LOG_DYNAMIC, &destination,
ISC_LOG_PRINTTIME |
ISC_LOG_PRINTCATEGORY |
ISC_LOG_PRINTLEVEL);
}
#if ISC_FACILITY != LOG_DAEMON
destination.facility = ISC_FACILITY;
isc_log_createchannel(lcfg, "default_syslog", ISC_LOG_TOSYSLOG,
ISC_LOG_INFO, &destination, 0);
#endif /* if ISC_FACILITY != LOG_DAEMON */
}
/*
* If the SSLKEYLOGFILE environment variable is set, TLS pre-master secrets are
* logged (for debugging purposes) to the file whose path is provided in that
* variable. Set up a default logging channel which maintains up to 10 files
* containing TLS pre-master secrets, each up to 100 MB in size. If the
* SSLKEYLOGFILE environment variable is set to the string "config", suppress
* creation of the default channel, allowing custom logging channel
* configuration for TLS pre-master secrets to be provided via the "logging"
* stanza in the configuration file.
*/
void
named_log_setdefaultsslkeylogfile(isc_logconfig_t *lcfg) {
const char *sslkeylogfile_path = getenv("SSLKEYLOGFILE");
isc_logdestination_t destination = {
.file = {
.name = sslkeylogfile_path,
.versions = 10,
.suffix = isc_log_rollsuffix_timestamp,
.maximum_size = 100 * 1024 * 1024,
},
};
isc_result_t result;
if (sslkeylogfile_path == NULL ||
strcmp(sslkeylogfile_path, "config") == 0)
{
return;
}
isc_log_createchannel(lcfg, "default_sslkeylogfile", ISC_LOG_TOFILE,
ISC_LOG_INFO, &destination, 0);
result = isc_log_usechannel(lcfg, "default_sslkeylogfile",
ISC_LOGCATEGORY_SSLKEYLOG, NULL);
RUNTIME_CHECK(result == ISC_R_SUCCESS);
}
isc_result_t
named_log_setdefaultcategory(isc_logconfig_t *lcfg) {
isc_result_t result = ISC_R_SUCCESS;
result = isc_log_usechannel(lcfg, "default_debug",
ISC_LOGCATEGORY_DEFAULT, NULL);
if (result != ISC_R_SUCCESS) {
goto cleanup;
}
if (!named_g_logstderr) {
if (named_g_logfile != NULL) {
result = isc_log_usechannel(lcfg, "default_logfile",
ISC_LOGCATEGORY_DEFAULT,
NULL);
} else if (!named_g_nosyslog) {
result = isc_log_usechannel(lcfg, "default_syslog",
ISC_LOGCATEGORY_DEFAULT,
NULL);
}
}
cleanup:
return (result);
}
isc_result_t
named_log_setunmatchedcategory(isc_logconfig_t *lcfg) {
isc_result_t result;
result = isc_log_usechannel(lcfg, "null", NAMED_LOGCATEGORY_UNMATCHED,
NULL);
return (result);
}
void
named_log_shutdown(void) {
isc_log_destroy(&named_g_lctx);
isc_log_setcontext(NULL);
dns_log_setcontext(NULL);
}
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