mirror of
https://github.com/isc-projects/bind9.git
synced 2026-02-27 03:51:16 -05:00
ef1d909fa9
this rolls up numerous changes that have been applied to the main branch, including moving isc_task operations into the netmgr event loops, and other general stabilization.
348 lines
8.3 KiB
C
348 lines
8.3 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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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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/*! \file
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*/
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#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <isc/app.h>
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#include <isc/commandline.h>
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#include <isc/hash.h>
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#include <isc/managers.h>
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#include <isc/netaddr.h>
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#include <isc/print.h>
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#include <isc/task.h>
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#include <isc/timer.h>
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#include <isc/util.h>
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#include <dns/adb.h>
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#include <dns/cache.h>
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#include <dns/dispatch.h>
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#include <dns/events.h>
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#include <dns/forward.h>
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#include <dns/log.h>
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#include <dns/resolver.h>
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#include <dns/result.h>
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static isc_mem_t *mctx = NULL;
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static isc_nm_t *netmgr = NULL;
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static isc_taskmgr_t *taskmgr = NULL;
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static dns_view_t *view = NULL;
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static dns_adbfind_t *find = NULL;
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static isc_task_t *task = NULL;
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static dns_fixedname_t fixed;
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static dns_fixedname_t target;
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static isc_log_t *lctx = NULL;
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static isc_logconfig_t *lcfg = NULL;
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static unsigned int level = 0;
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static void
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adb_callback(isc_task_t *task, isc_event_t *event);
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static void
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log_init(void) {
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isc_logdestination_t destination;
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unsigned int flags;
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/*
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* Setup a logging context.
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*/
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isc_log_create(mctx, &lctx, &lcfg);
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isc_log_setcontext(lctx);
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dns_log_init(lctx);
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dns_log_setcontext(lctx);
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/*
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* Create and install the default channel.
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*/
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destination.file.stream = stderr;
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destination.file.name = NULL;
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destination.file.versions = ISC_LOG_ROLLNEVER;
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destination.file.maximum_size = 0;
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flags = ISC_LOG_PRINTTIME;
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isc_log_createchannel(lcfg, "_default", ISC_LOG_TOFILEDESC,
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ISC_LOG_DYNAMIC, &destination, flags);
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RUNTIME_CHECK(isc_log_usechannel(lcfg, "_default", NULL, NULL) ==
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ISC_R_SUCCESS);
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isc_log_setdebuglevel(lctx, level);
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}
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static void
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print_addresses(dns_adbfind_t *adbfind) {
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dns_adbaddrinfo_t *address;
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for (address = ISC_LIST_HEAD(adbfind->list); address != NULL;
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address = ISC_LIST_NEXT(address, publink))
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{
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isc_netaddr_t netaddr;
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char text[ISC_NETADDR_FORMATSIZE];
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isc_netaddr_fromsockaddr(&netaddr, &address->sockaddr);
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isc_netaddr_format(&netaddr, text, sizeof(text));
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printf("%s\n", text);
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}
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}
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static void
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print_name(dns_name_t *name) {
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char text[DNS_NAME_FORMATSIZE];
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dns_name_format(name, text, sizeof(text));
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printf("%s\n", text);
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}
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static void
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do_find(bool want_event) {
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isc_result_t result;
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bool done = false;
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unsigned int options;
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options = DNS_ADBFIND_INET | DNS_ADBFIND_INET6;
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if (want_event) {
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options |= DNS_ADBFIND_WANTEVENT | DNS_ADBFIND_EMPTYEVENT;
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}
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dns_fixedname_init(&target);
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result = dns_adb_createfind(view->adb, task, adb_callback, NULL,
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dns_fixedname_name(&fixed), dns_rootname, 0,
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options, 0, dns_fixedname_name(&target), 0,
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0, NULL, &find);
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if (result == ISC_R_SUCCESS) {
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if (!ISC_LIST_EMPTY(find->list)) {
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/*
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* We have at least some of the addresses for the
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* name.
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*/
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INSIST((find->options & DNS_ADBFIND_WANTEVENT) == 0);
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print_addresses(find);
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done = true;
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} else {
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/*
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* We don't know any of the addresses for this
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* name.
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*/
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if ((find->options & DNS_ADBFIND_WANTEVENT) == 0) {
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/*
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* And ADB isn't going to send us any events
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* either. This query loses.
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*/
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done = true;
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}
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/*
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* If the DNS_ADBFIND_WANTEVENT flag was set, we'll
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* get an event when something happens.
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*/
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}
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} else if (result == DNS_R_ALIAS) {
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print_name(dns_fixedname_name(&target));
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done = true;
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} else {
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printf("dns_adb_createfind() returned %s\n",
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isc_result_totext(result));
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done = true;
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}
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if (done) {
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if (find != NULL) {
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dns_adb_destroyfind(&find);
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}
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isc_app_shutdown();
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}
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}
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static void
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adb_callback(isc_task_t *etask, isc_event_t *event) {
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unsigned int type = event->ev_type;
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REQUIRE(etask == task);
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isc_event_free(&event);
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dns_adb_destroyfind(&find);
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if (type == DNS_EVENT_ADBMOREADDRESSES) {
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do_find(false);
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} else if (type == DNS_EVENT_ADBNOMOREADDRESSES) {
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printf("no more addresses\n");
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isc_app_shutdown();
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} else {
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printf("unexpected ADB event type %u\n", type);
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isc_app_shutdown();
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}
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}
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static void
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run(isc_task_t *xtask, isc_event_t *event) {
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UNUSED(xtask);
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do_find(true);
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isc_event_free(&event);
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}
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int
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main(int argc, char *argv[]) {
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bool verbose = false;
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unsigned int workers = 2;
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isc_timermgr_t *timermgr = NULL;
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int ch;
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isc_socketmgr_t *socketmgr = NULL;
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dns_dispatchmgr_t *dispatchmgr = NULL;
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dns_cache_t *cache = NULL;
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isc_buffer_t b;
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RUNTIME_CHECK(isc_app_start() == ISC_R_SUCCESS);
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dns_result_register();
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isc_mem_create(&mctx);
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while ((ch = isc_commandline_parse(argc, argv, "d:vw:")) != -1) {
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switch (ch) {
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case 'd':
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level = (unsigned int)atoi(isc_commandline_argument);
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break;
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case 'v':
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verbose = true;
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break;
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case 'w':
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workers = (unsigned int)atoi(isc_commandline_argument);
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break;
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}
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}
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log_init();
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if (verbose) {
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printf("%u workers\n", workers);
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printf("IPv4: %s\n", isc_result_totext(isc_net_probeipv4()));
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printf("IPv6: %s\n", isc_result_totext(isc_net_probeipv6()));
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}
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RUNTIME_CHECK(isc_managers_create(mctx, workers, 0, &netmgr,
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&taskmgr) == ISC_R_SUCCESS);
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RUNTIME_CHECK(isc_task_create(taskmgr, 0, &task) == ISC_R_SUCCESS);
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isc_task_setname(task, "byname", NULL);
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RUNTIME_CHECK(dns_dispatchmgr_create(mctx, &dispatchmgr) ==
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ISC_R_SUCCESS);
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RUNTIME_CHECK(isc_timermgr_create(mctx, &timermgr) == ISC_R_SUCCESS);
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RUNTIME_CHECK(isc_socketmgr_create(mctx, &socketmgr) == ISC_R_SUCCESS);
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RUNTIME_CHECK(dns_cache_create(mctx, mctx, taskmgr, timermgr,
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dns_rdataclass_in, "", "rbt", 0, NULL,
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&cache) == ISC_R_SUCCESS);
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RUNTIME_CHECK(dns_view_create(mctx, dns_rdataclass_in, "default",
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&view) == ISC_R_SUCCESS);
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{
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unsigned int attrs;
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dns_dispatch_t *disp4 = NULL;
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dns_dispatch_t *disp6 = NULL;
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if (isc_net_probeipv4() == ISC_R_SUCCESS) {
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isc_sockaddr_t any4;
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isc_sockaddr_any(&any4);
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attrs = DNS_DISPATCHATTR_IPV4 | DNS_DISPATCHATTR_UDP;
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RUNTIME_CHECK(
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dns_dispatch_getudp(dispatchmgr, socketmgr,
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taskmgr, &any4, 512, 6,
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1024, 17, 19, attrs, attrs,
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&disp4) == ISC_R_SUCCESS);
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INSIST(disp4 != NULL);
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}
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if (isc_net_probeipv6() == ISC_R_SUCCESS) {
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isc_sockaddr_t any6;
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isc_sockaddr_any6(&any6);
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attrs = DNS_DISPATCHATTR_IPV6 | DNS_DISPATCHATTR_UDP;
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RUNTIME_CHECK(
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dns_dispatch_getudp(dispatchmgr, socketmgr,
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taskmgr, &any6, 512, 6,
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1024, 17, 19, attrs, attrs,
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&disp6) == ISC_R_SUCCESS);
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INSIST(disp6 != NULL);
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}
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RUNTIME_CHECK(dns_view_createresolver(view, taskmgr, 10, 1,
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socketmgr, timermgr, 0,
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dispatchmgr, disp4,
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disp6) == ISC_R_SUCCESS);
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if (disp4 != NULL) {
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dns_dispatch_detach(&disp4);
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}
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if (disp6 != NULL) {
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dns_dispatch_detach(&disp6);
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}
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}
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{
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struct in_addr ina;
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isc_sockaddr_t sa;
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isc_sockaddrlist_t sal;
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ISC_LIST_INIT(sal);
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ina.s_addr = inet_addr("127.0.0.1");
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isc_sockaddr_fromin(&sa, &ina, 53);
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ISC_LIST_APPEND(sal, &sa, link);
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REQUIRE(DNS_VIEW_VALID(view));
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RUNTIME_CHECK(dns_fwdtable_add(view->fwdtable, dns_rootname,
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&sal, dns_fwdpolicy_only) ==
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ISC_R_SUCCESS);
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}
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dns_view_setcache(view, cache, false);
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dns_view_freeze(view);
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dns_cache_detach(&cache);
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printf("name = %s\n", argv[isc_commandline_index]);
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isc_buffer_init(&b, argv[isc_commandline_index],
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strlen(argv[isc_commandline_index]));
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isc_buffer_add(&b, strlen(argv[isc_commandline_index]));
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dns_fixedname_init(&fixed);
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dns_fixedname_init(&target);
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RUNTIME_CHECK(dns_name_fromtext(dns_fixedname_name(&fixed), &b,
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dns_rootname, 0,
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NULL) == ISC_R_SUCCESS);
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RUNTIME_CHECK(isc_app_onrun(mctx, task, run, NULL) == ISC_R_SUCCESS);
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(void)isc_app_run();
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dns_view_detach(&view);
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isc_task_shutdown(task);
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isc_task_detach(&task);
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dns_dispatchmgr_destroy(&dispatchmgr);
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isc_managers_destroy(&netmgr, &taskmgr);
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isc_socketmgr_destroy(&socketmgr);
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isc_timermgr_destroy(&timermgr);
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isc_log_destroy(&lctx);
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if (verbose) {
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isc_mem_stats(mctx, stdout);
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}
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isc_mem_destroy(&mctx);
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isc_app_finish();
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return (0);
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}
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