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bind/lib/ns/server.c

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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* 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 http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*! \file */
#include <stdbool.h>
#include <isc/mem.h>
#include <isc/stats.h>
#include <isc/util.h>
#include <dns/stats.h>
#include <dns/tkey.h>
#include <ns/query.h>
#include <ns/server.h>
#include <ns/stats.h>
#define SCTX_MAGIC ISC_MAGIC('S', 'c', 't', 'x')
#define SCTX_VALID(s) ISC_MAGIC_VALID(s, SCTX_MAGIC)
#define CHECKFATAL(op) \
do { \
result = (op); \
RUNTIME_CHECK(result == ISC_R_SUCCESS); \
} while (0)
isc_result_t
ns_server_create(isc_mem_t *mctx, ns_matchview_t matchingview,
ns_server_t **sctxp)
{
ns_server_t *sctx;
isc_result_t result;
REQUIRE(sctxp != NULL && *sctxp == NULL);
sctx = isc_mem_get(mctx, sizeof(*sctx));
memset(sctx, 0, sizeof(*sctx));
isc_mem_attach(mctx, &sctx->mctx);
isc_refcount_init(&sctx->references, 1);
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isc_quota_init(&sctx->xfroutquota, 10);
isc_quota_init(&sctx->tcpquota, 10);
isc_quota_init(&sctx->recursionquota, 100);
CHECKFATAL(dns_tkeyctx_create(mctx, &sctx->tkeyctx));
CHECKFATAL(ns_stats_create(mctx, ns_statscounter_max, &sctx->nsstats));
CHECKFATAL(dns_rdatatypestats_create(mctx, &sctx->rcvquerystats));
CHECKFATAL(dns_opcodestats_create(mctx, &sctx->opcodestats));
CHECKFATAL(dns_rcodestats_create(mctx, &sctx->rcodestats));
CHECKFATAL(isc_stats_create(mctx, &sctx->udpinstats4,
dns_sizecounter_in_max));
CHECKFATAL(isc_stats_create(mctx, &sctx->udpoutstats4,
dns_sizecounter_out_max));
CHECKFATAL(isc_stats_create(mctx, &sctx->udpinstats6,
dns_sizecounter_in_max));
CHECKFATAL(isc_stats_create(mctx, &sctx->udpoutstats6,
dns_sizecounter_out_max));
CHECKFATAL(isc_stats_create(mctx, &sctx->tcpinstats4,
dns_sizecounter_in_max));
CHECKFATAL(isc_stats_create(mctx, &sctx->tcpoutstats4,
dns_sizecounter_out_max));
CHECKFATAL(isc_stats_create(mctx, &sctx->tcpinstats6,
dns_sizecounter_in_max));
CHECKFATAL(isc_stats_create(mctx, &sctx->tcpoutstats6,
dns_sizecounter_out_max));
sctx->udpsize = 4096;
sctx->transfer_tcp_message_size = 20480;
sctx->fuzztype = isc_fuzz_none;
sctx->fuzznotify = NULL;
sctx->gethostname = NULL;
sctx->matchingview = matchingview;
sctx->answercookie = true;
ISC_LIST_INIT(sctx->altsecrets);
sctx->magic = SCTX_MAGIC;
*sctxp = sctx;
return (ISC_R_SUCCESS);
}
void
ns_server_attach(ns_server_t *src, ns_server_t **dest)
{
REQUIRE(SCTX_VALID(src));
REQUIRE(dest != NULL && *dest == NULL);
isc_refcount_increment(&src->references);
*dest = src;
}
void
ns_server_detach(ns_server_t **sctxp)
{
ns_server_t *sctx;
REQUIRE(sctxp != NULL && SCTX_VALID(*sctxp));
sctx = *sctxp;
*sctxp = NULL;
if (isc_refcount_decrement(&sctx->references) == 1) {
ns_altsecret_t *altsecret;
while ((altsecret = ISC_LIST_HEAD(sctx->altsecrets)) != NULL) {
ISC_LIST_UNLINK(sctx->altsecrets, altsecret, link);
isc_mem_put(sctx->mctx, altsecret, sizeof(*altsecret));
}
isc_quota_destroy(&sctx->recursionquota);
isc_quota_destroy(&sctx->tcpquota);
isc_quota_destroy(&sctx->xfroutquota);
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if (sctx->server_id != NULL) {
isc_mem_free(sctx->mctx, sctx->server_id);
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}
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if (sctx->blackholeacl != NULL) {
dns_acl_detach(&sctx->blackholeacl);
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}
if (sctx->keepresporder != NULL) {
dns_acl_detach(&sctx->keepresporder);
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}
if (sctx->tkeyctx != NULL) {
dns_tkeyctx_destroy(&sctx->tkeyctx);
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}
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if (sctx->nsstats != NULL) {
ns_stats_detach(&sctx->nsstats);
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}
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if (sctx->rcvquerystats != NULL) {
dns_stats_detach(&sctx->rcvquerystats);
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}
if (sctx->opcodestats != NULL) {
dns_stats_detach(&sctx->opcodestats);
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}
if (sctx->rcodestats != NULL) {
dns_stats_detach(&sctx->rcodestats);
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}
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if (sctx->udpinstats4 != NULL) {
isc_stats_detach(&sctx->udpinstats4);
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}
if (sctx->tcpinstats4 != NULL) {
isc_stats_detach(&sctx->tcpinstats4);
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}
if (sctx->udpoutstats4 != NULL) {
isc_stats_detach(&sctx->udpoutstats4);
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}
if (sctx->tcpoutstats4 != NULL) {
isc_stats_detach(&sctx->tcpoutstats4);
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}
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if (sctx->udpinstats6 != NULL) {
isc_stats_detach(&sctx->udpinstats6);
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}
if (sctx->tcpinstats6 != NULL) {
isc_stats_detach(&sctx->tcpinstats6);
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}
if (sctx->udpoutstats6 != NULL) {
isc_stats_detach(&sctx->udpoutstats6);
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}
if (sctx->tcpoutstats6 != NULL) {
isc_stats_detach(&sctx->tcpoutstats6);
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}
sctx->magic = 0;
isc_mem_putanddetach(&sctx->mctx, sctx, sizeof(*sctx));
}
}
isc_result_t
ns_server_setserverid(ns_server_t *sctx, const char *serverid)
{
REQUIRE(SCTX_VALID(sctx));
if (sctx->server_id != NULL) {
isc_mem_free(sctx->mctx, sctx->server_id);
sctx->server_id = NULL;
}
if (serverid != NULL) {
sctx->server_id = isc_mem_strdup(sctx->mctx, serverid);
}
return (ISC_R_SUCCESS);
}
void
ns_server_setoption(ns_server_t *sctx, unsigned int option, bool value)
{
REQUIRE(SCTX_VALID(sctx));
if (value) {
sctx->options |= option;
} else {
sctx->options &= ~option;
}
}
bool
ns_server_getoption(ns_server_t *sctx, unsigned int option)
{
REQUIRE(SCTX_VALID(sctx));
return ((sctx->options & option) != 0);
}