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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.
*/
#pragma once
/*! \file */
#include <inttypes.h>
#include <stdbool.h>
#include <isc/fuzz.h>
#include <isc/log.h>
#include <isc/magic.h>
#include <isc/quota.h>
#include <isc/random.h>
#include <isc/sockaddr.h>
#include <isc/types.h>
#include <dns/acl.h>
#include <dns/types.h>
#include <ns/events.h>
#include <ns/types.h>
#define NS_SERVER_LOGQUERIES 0x00000001U /*%< log queries */
#define NS_SERVER_NOAA 0x00000002U /*%< -T noaa */
#define NS_SERVER_NOSOA 0x00000004U /*%< -T nosoa */
#define NS_SERVER_NONEAREST 0x00000008U /*%< -T nonearest */
#define NS_SERVER_NOEDNS 0x00000020U /*%< -T noedns */
#define NS_SERVER_DROPEDNS 0x00000040U /*%< -T dropedns */
#define NS_SERVER_NOTCP 0x00000080U /*%< -T notcp */
#define NS_SERVER_DISABLE4 0x00000100U /*%< -6 */
#define NS_SERVER_DISABLE6 0x00000200U /*%< -4 */
#define NS_SERVER_FIXEDLOCAL 0x00000400U /*%< -T fixedlocal */
#define NS_SERVER_SIGVALINSECS 0x00000800U /*%< -T sigvalinsecs */
#define NS_SERVER_EDNSFORMERR 0x00001000U /*%< -T ednsformerr (STD13) */
#define NS_SERVER_EDNSNOTIMP 0x00002000U /*%< -T ednsnotimp */
#define NS_SERVER_EDNSREFUSED 0x00004000U /*%< -T ednsrefused */
#define NS_SERVER_TRANSFERINSECS 0x00008000U /*%< -T transferinsecs */
#define NS_SERVER_TRANSFERSLOWLY 0x00010000U /*%< -T transferslowly */
#define NS_SERVER_TRANSFERSTUCK 0x00020000U /*%< -T transferstuck */
/*%
* Type for callback function to get hostname.
*/
typedef isc_result_t (*ns_hostnamecb_t)(char *buf, size_t len);
/*%
* Type for callback function to signal the fuzzer thread
* when built with AFL.
*/
typedef void (*ns_fuzzcb_t)(void);
/*%
* Type for callback function to get the view that can answer a query.
*/
typedef isc_result_t (*ns_matchview_t)(
isc_netaddr_t *srcaddr, isc_netaddr_t *destaddr, dns_message_t *message,
dns_aclenv_t *env, isc_result_t *sigresultp, dns_view_t **viewp);
/*%
* Server context.
*/
struct ns_server {
unsigned int magic;
isc_mem_t *mctx;
isc_refcount_t references;
/*% Server cookie secret and algorithm */
unsigned char secret[32];
ns_cookiealg_t cookiealg;
ns_altsecretlist_t altsecrets;
bool answercookie;
/*% Quotas */
isc_quota_t recursionquota;
isc_quota_t tcpquota;
isc_quota_t xfroutquota;
isc_quota_t updquota;
ISC_LIST(isc_quota_t) http_quotas;
isc_mutex_t http_quotas_lock;
/*% Test options and other configurables */
uint32_t options;
dns_acl_t *blackholeacl;
dns_acl_t *keepresporder;
uint16_t udpsize;
uint16_t transfer_tcp_message_size;
bool interface_auto;
dns_tkeyctx_t *tkeyctx;
/*% Server id for NSID */
char *server_id;
bool usehostname;
/*% Fuzzer callback */
isc_fuzztype_t fuzztype;
ns_fuzzcb_t fuzznotify;
/*% Callback to find a matching view for a query */
ns_matchview_t matchingview;
/*% Stats counters */
ns_stats_t *nsstats;
dns_stats_t *rcvquerystats;
dns_stats_t *opcodestats;
dns_stats_t *rcodestats;
isc_stats_t *udpinstats4;
isc_stats_t *udpoutstats4;
isc_stats_t *udpinstats6;
isc_stats_t *udpoutstats6;
isc_stats_t *tcpinstats4;
isc_stats_t *tcpoutstats4;
isc_stats_t *tcpinstats6;
isc_stats_t *tcpoutstats6;
};
struct ns_altsecret {
ISC_LINK(ns_altsecret_t) link;
unsigned char secret[32];
};
isc_result_t
ns_server_create(isc_mem_t *mctx, ns_matchview_t matchingview,
ns_server_t **sctxp);
/*%<
* Create a server context object with default settings.
*/
void
ns_server_attach(ns_server_t *src, ns_server_t **dest);
/*%<
* Attach a server context.
*
* Requires:
*\li 'src' is valid.
*/
void
ns_server_detach(ns_server_t **sctxp);
/*%<
* Detach from a server context. If its reference count drops to zero, destroy
* it, freeing its memory.
*
* Requires:
*\li '*sctxp' is valid.
* Ensures:
*\li '*sctxp' is NULL on return.
*/
isc_result_t
ns_server_setserverid(ns_server_t *sctx, const char *serverid);
/*%<
* Set sctx->server_id to 'serverid'. If it was set previously, free the memory.
*
* Requires:
*\li 'sctx' is valid.
*/
void
ns_server_setoption(ns_server_t *sctx, unsigned int option, bool value);
/*%<
* Set the given options on (if 'value' == #true)
* or off (if 'value' == #false).
*
* Requires:
*\li 'sctx' is valid
*/
bool
ns_server_getoption(ns_server_t *sctx, unsigned int option);
/*%<
* Returns the current value of the specified server option.
*
* Requires:
*\li 'sctx' is valid.
*/
void
ns_server_append_http_quota(ns_server_t *sctx, isc_quota_t *http_quota);
/*%<
* Add a quota to the list of HTTP quotas to destroy it safely later.
*
* Requires:
*\li 'sctx' is valid;
*\li 'http_quota' is not 'NULL'.
*/
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