Tony FinchandTony Finch
0d353704fb
This should have no functional effects. The message size stats are specified by RSSAC002 so it's best not to mess around with how they appear in the statschannel. But it's worth changing the implementation to use general-purpose histograms, to reduce code size and benefit from sharded counters.
198 lines
4.8 KiB
C
198 lines
4.8 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* SPDX-License-Identifier: MPL-2.0
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, you can obtain one at https://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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#pragma once
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/*! \file */
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#include <inttypes.h>
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#include <stdbool.h>
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#include <isc/fuzz.h>
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#include <isc/histo.h>
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#include <isc/log.h>
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#include <isc/magic.h>
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#include <isc/quota.h>
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#include <isc/random.h>
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#include <isc/sockaddr.h>
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#include <isc/types.h>
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#include <dns/acl.h>
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#include <dns/types.h>
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#include <ns/types.h>
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#define NS_SERVER_LOGQUERIES 0x00000001U /*%< log queries */
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#define NS_SERVER_NOAA 0x00000002U /*%< -T noaa */
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#define NS_SERVER_NOSOA 0x00000004U /*%< -T nosoa */
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#define NS_SERVER_NONEAREST 0x00000008U /*%< -T nonearest */
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#define NS_SERVER_NOEDNS 0x00000020U /*%< -T noedns */
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#define NS_SERVER_DROPEDNS 0x00000040U /*%< -T dropedns */
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#define NS_SERVER_NOTCP 0x00000080U /*%< -T notcp */
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#define NS_SERVER_DISABLE4 0x00000100U /*%< -6 */
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#define NS_SERVER_DISABLE6 0x00000200U /*%< -4 */
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#define NS_SERVER_FIXEDLOCAL 0x00000400U /*%< -T fixedlocal */
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#define NS_SERVER_SIGVALINSECS 0x00000800U /*%< -T sigvalinsecs */
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#define NS_SERVER_EDNSFORMERR 0x00001000U /*%< -T ednsformerr (STD13) */
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#define NS_SERVER_EDNSNOTIMP 0x00002000U /*%< -T ednsnotimp */
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#define NS_SERVER_EDNSREFUSED 0x00004000U /*%< -T ednsrefused */
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/*%
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* Type for callback function to get hostname.
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*/
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typedef isc_result_t (*ns_hostnamecb_t)(char *buf, size_t len);
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/*%
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* Type for callback function to signal the fuzzer thread
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* when built with AFL.
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*/
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typedef void (*ns_fuzzcb_t)(void);
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/*%
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* Type for callback function to get the view that can answer a query.
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*/
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typedef isc_result_t (*ns_matchview_t)(
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isc_netaddr_t *srcaddr, isc_netaddr_t *destaddr, dns_message_t *message,
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dns_aclenv_t *env, isc_result_t *sigresultp, dns_view_t **viewp);
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/*%
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* Server context.
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*/
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struct ns_server {
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unsigned int magic;
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isc_mem_t *mctx;
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isc_refcount_t references;
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/*% Server cookie secret and algorithm */
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unsigned char secret[32];
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ns_cookiealg_t cookiealg;
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ns_altsecretlist_t altsecrets;
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bool answercookie;
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/*% Quotas */
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isc_quota_t recursionquota;
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isc_quota_t tcpquota;
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isc_quota_t xfroutquota;
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isc_quota_t updquota;
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ISC_LIST(isc_quota_t) http_quotas;
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isc_mutex_t http_quotas_lock;
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/*% Test options and other configurables */
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uint32_t options;
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dns_acl_t *blackholeacl;
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uint16_t udpsize;
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uint16_t transfer_tcp_message_size;
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bool interface_auto;
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dns_tkeyctx_t *tkeyctx;
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/*% Server id for NSID */
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char *server_id;
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bool usehostname;
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/*% Fuzzer callback */
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isc_fuzztype_t fuzztype;
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ns_fuzzcb_t fuzznotify;
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/*% Callback to find a matching view for a query */
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ns_matchview_t matchingview;
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/*% Stats counters */
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ns_stats_t *nsstats;
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dns_stats_t *rcvquerystats;
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dns_stats_t *opcodestats;
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dns_stats_t *rcodestats;
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isc_histomulti_t *udpinstats4;
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isc_histomulti_t *udpoutstats4;
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isc_histomulti_t *udpinstats6;
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isc_histomulti_t *udpoutstats6;
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isc_histomulti_t *tcpinstats4;
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isc_histomulti_t *tcpoutstats4;
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isc_histomulti_t *tcpinstats6;
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isc_histomulti_t *tcpoutstats6;
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};
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struct ns_altsecret {
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ISC_LINK(ns_altsecret_t) link;
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unsigned char secret[32];
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};
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isc_result_t
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ns_server_create(isc_mem_t *mctx, ns_matchview_t matchingview,
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ns_server_t **sctxp);
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/*%<
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* Create a server context object with default settings.
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*/
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void
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ns_server_attach(ns_server_t *src, ns_server_t **dest);
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/*%<
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* Attach a server context.
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*
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* Requires:
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*\li 'src' is valid.
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*/
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void
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ns_server_detach(ns_server_t **sctxp);
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/*%<
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* Detach from a server context. If its reference count drops to zero, destroy
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* it, freeing its memory.
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*
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* Requires:
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*\li '*sctxp' is valid.
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* Ensures:
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*\li '*sctxp' is NULL on return.
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*/
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isc_result_t
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ns_server_setserverid(ns_server_t *sctx, const char *serverid);
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/*%<
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* Set sctx->server_id to 'serverid'. If it was set previously, free the memory.
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*
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* Requires:
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*\li 'sctx' is valid.
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*/
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void
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ns_server_setoption(ns_server_t *sctx, unsigned int option, bool value);
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/*%<
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* Set the given options on (if 'value' == #true)
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* or off (if 'value' == #false).
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*
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* Requires:
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*\li 'sctx' is valid
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*/
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bool
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ns_server_getoption(ns_server_t *sctx, unsigned int option);
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/*%<
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* Returns the current value of the specified server option.
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*
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* Requires:
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*\li 'sctx' is valid.
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*/
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void
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ns_server_append_http_quota(ns_server_t *sctx, isc_quota_t *http_quota);
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/*%<
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* Add a quota to the list of HTTP quotas to destroy it safely later.
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*
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* Requires:
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*\li 'sctx' is valid;
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*\li 'http_quota' is not 'NULL'.
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*/
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