mirror of
https://gitlab.isc.org/isc-projects/bind9
synced 2025-08-31 14:35:26 +00:00
create a resolver and a cache, and load hints from the built-in string. Look up f.root-servers.net.
This commit is contained in:
@@ -29,15 +29,27 @@
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#include <isc/mem.h>
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#include <isc/task.h>
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#include <isc/thread.h>
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#include <isc/timer.h>
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#include <isc/result.h>
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#include <isc/sockaddr.h>
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#include <isc/socket.h>
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#include <isc/net.h>
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#include <dns/name.h>
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#include <dns/address.h>
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#include <dns/db.h>
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#include <dns/master.h>
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#include <dns/name.h>
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isc_mem_t *mctx;
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isc_taskmgr_t *manager;
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isc_socketmgr_t *socketmgr;
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isc_timermgr_t *timermgr;
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unsigned char namestorage1[512];
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unsigned char namestorage2[512];
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unsigned char namestorage3[512];
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unsigned char namestorage4[512];
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dns_view_t *view;
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dns_db_t *ns_g_rootns;
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static void lookup_callback(isc_task_t *, isc_event_t *);
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static void fatal(char *, ...);
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@@ -62,6 +74,94 @@ check_result(isc_result_t result, char *msg)
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fatal("%s: %s", msg, isc_result_totext(result));
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}
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static char root_ns[] =
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";\n"
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"; Internet Root Nameservers\n"
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";\n"
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"; Thu Sep 23 17:57:37 PDT 1999\n"
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";\n"
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"$TTL 518400\n"
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". 518400 IN NS F.ROOT-SERVERS.NET.\n"
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". 518400 IN NS B.ROOT-SERVERS.NET.\n"
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". 518400 IN NS J.ROOT-SERVERS.NET.\n"
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". 518400 IN NS K.ROOT-SERVERS.NET.\n"
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". 518400 IN NS L.ROOT-SERVERS.NET.\n"
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". 518400 IN NS M.ROOT-SERVERS.NET.\n"
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". 518400 IN NS I.ROOT-SERVERS.NET.\n"
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". 518400 IN NS E.ROOT-SERVERS.NET.\n"
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". 518400 IN NS D.ROOT-SERVERS.NET.\n"
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". 518400 IN NS A.ROOT-SERVERS.NET.\n"
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". 518400 IN NS H.ROOT-SERVERS.NET.\n"
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". 518400 IN NS C.ROOT-SERVERS.NET.\n"
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". 518400 IN NS G.ROOT-SERVERS.NET.\n"
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"F.ROOT-SERVERS.NET. 3600000 IN A 192.5.5.241\n"
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"B.ROOT-SERVERS.NET. 3600000 IN A 128.9.0.107\n"
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"J.ROOT-SERVERS.NET. 3600000 IN A 198.41.0.10\n"
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"K.ROOT-SERVERS.NET. 3600000 IN A 193.0.14.129\n"
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"L.ROOT-SERVERS.NET. 3600000 IN A 198.32.64.12\n"
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"M.ROOT-SERVERS.NET. 3600000 IN A 202.12.27.33\n"
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"I.ROOT-SERVERS.NET. 3600000 IN A 192.36.148.17\n"
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"E.ROOT-SERVERS.NET. 3600000 IN A 192.203.230.10\n"
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"D.ROOT-SERVERS.NET. 3600000 IN A 128.8.10.90\n"
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"A.ROOT-SERVERS.NET. 3600000 IN A 198.41.0.4\n"
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"H.ROOT-SERVERS.NET. 3600000 IN A 128.63.2.53\n"
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"C.ROOT-SERVERS.NET. 3600000 IN A 192.33.4.12\n"
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"G.ROOT-SERVERS.NET. 3600000 IN A 192.112.36.4\n";
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isc_result_t
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ns_rootns_init(void)
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{
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dns_result_t result, eresult;
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isc_buffer_t source;
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size_t len;
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int soacount, nscount;
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dns_rdatacallbacks_t callbacks;
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REQUIRE(ns_g_rootns == NULL);
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result = dns_db_create(mctx, "rbt", dns_rootname, ISC_FALSE,
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dns_rdataclass_in, 0, NULL, &ns_g_rootns);
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if (result != ISC_R_SUCCESS)
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return (result);
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dns_rdatacallbacks_init(&callbacks);
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len = strlen(root_ns);
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isc_buffer_init(&source, root_ns, len, ISC_BUFFERTYPE_TEXT);
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isc_buffer_add(&source, len);
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result = dns_db_beginload(ns_g_rootns, &callbacks.add,
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&callbacks.add_private);
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if (result != ISC_R_SUCCESS)
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return (result);
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result = dns_master_loadbuffer(&source, &ns_g_rootns->origin,
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&ns_g_rootns->origin,
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ns_g_rootns->rdclass, ISC_FALSE,
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&soacount, &nscount, &callbacks,
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ns_g_rootns->mctx);
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eresult = dns_db_endload(ns_g_rootns, &callbacks.add_private);
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if (result == ISC_R_SUCCESS)
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result = eresult;
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if (result != ISC_R_SUCCESS)
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goto db_detach;
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return (DNS_R_SUCCESS);
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db_detach:
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dns_db_detach(&ns_g_rootns);
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return (result);
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}
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void
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ns_rootns_destroy(void)
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{
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REQUIRE(ns_g_rootns != NULL);
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dns_db_detach(&ns_g_rootns);
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}
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static void
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lookup_callback(isc_task_t *task, isc_event_t *ev)
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{
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@@ -78,9 +178,74 @@ lookup_callback(isc_task_t *task, isc_event_t *ev)
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isc_app_shutdown();
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}
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unsigned char namestorage1[512];
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unsigned char namestorage2[512];
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unsigned char namestorage3[512];
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void
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create_managers(void)
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{
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isc_result_t result;
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manager = NULL;
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result = isc_taskmgr_create(mctx, 2, 0, &manager);
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check_result(result, "isc_taskmgr_create");
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timermgr = NULL;
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result = isc_timermgr_create(mctx, &timermgr);
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check_result(result, "isc_timermgr_create");
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socketmgr = NULL;
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result = isc_socketmgr_create(mctx, &socketmgr);
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check_result(result, "isc_socketmgr_create");
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}
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void
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create_view(void)
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{
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dns_db_t *db;
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isc_result_t result;
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/*
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* View.
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*/
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view = NULL;
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result = dns_view_create(mctx, dns_rdataclass_in, "_default", &view);
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check_result(result, "dns_view_create");
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/*
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* Cache.
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*/
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db = NULL;
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result = dns_db_create(mctx, "rbt", dns_rootname, ISC_TRUE,
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dns_rdataclass_in, 0, NULL, &db);
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check_result(result, "dns_view_create");
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dns_view_setcachedb(view, db);
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dns_db_detach(&db);
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/*
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* Resolver.
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*
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* XXXRTH hardwired number of tasks. Also, we'll need to
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* see if we are dealing with a shared dispatcher in this view.
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*/
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result = dns_view_createresolver(view, manager, 16, socketmgr,
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timermgr, NULL);
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check_result(result, "dns_view_createresolver");
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result = ns_rootns_init();
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check_result(result, "ns_rootns_init()");
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/*
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* We have default hints for class IN.
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*/
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dns_view_sethints(view, ns_g_rootns);
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dns_view_freeze(view);
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}
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void
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destroy_view(void)
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{
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dns_view_detach(&view);
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ns_rootns_destroy();
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}
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int
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main(int argc, char **argv)
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@@ -89,9 +254,8 @@ main(int argc, char **argv)
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isc_sockaddr_t sockaddr;
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struct in_addr ina;
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isc_result_t result;
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dns_name_t name1, name2, name3;
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dns_name_t name1, name2, name3, name4;
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isc_buffer_t t, namebuf;
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dns_view_t *view;
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dns_adb_t *adb;
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dns_adbhandle_t *handle;
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dns_adbaddrinfo_t *ai;
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@@ -113,12 +277,7 @@ main(int argc, char **argv)
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mctx = NULL;
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RUNTIME_CHECK(isc_mem_create(0, 0, &mctx) == ISC_R_SUCCESS);
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/*
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* The task manager is independent (other than memory context)
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*/
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manager = NULL;
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result = isc_taskmgr_create(mctx, 2, 0, &manager);
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check_result(result, "isc_taskmgr_create");
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create_managers();
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t1 = NULL;
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result = isc_task_create(manager, NULL, 0, &t1);
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@@ -130,11 +289,7 @@ main(int argc, char **argv)
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printf("task 1 = %p\n", t1);
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printf("task 2 = %p\n", t2);
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view = NULL;
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result = dns_view_create(mctx, dns_rdataclass_in, "foo", &view);
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check_result(result, "dns_view_create");
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dns_view_freeze(view);
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create_view();
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/*
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* Create the address database.
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@@ -146,6 +301,7 @@ main(int argc, char **argv)
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#define NAME1 "kechara.flame.org."
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#define NAME2 "moghedien.isc.org."
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#define NAME3 "nonexistant.flame.org."
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#define NAME4 "f.root-servers.net."
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isc_buffer_init(&t, NAME1, sizeof NAME1 - 1, ISC_BUFFERTYPE_TEXT);
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isc_buffer_add(&t, strlen(NAME1));
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@@ -174,6 +330,15 @@ main(int argc, char **argv)
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&namebuf);
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check_result(result, "dns_name_fromtext NAME3");
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isc_buffer_init(&t, NAME4, sizeof NAME4 - 1, ISC_BUFFERTYPE_TEXT);
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isc_buffer_add(&t, strlen(NAME4));
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isc_buffer_init(&namebuf, namestorage4, sizeof namestorage4,
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ISC_BUFFERTYPE_BINARY);
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dns_name_init(&name4, NULL);
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result = dns_name_fromtext(&name4, &t, dns_rootname, ISC_FALSE,
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&namebuf);
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check_result(result, "dns_name_fromtext NAME4");
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/*
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* Store this address for this name.
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*/
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@@ -245,7 +410,7 @@ main(int argc, char **argv)
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dns_adb_dumphandle(adb, handle, stderr);
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/*
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* delete one of the names, and kill the adb
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* delete one of the names
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*/
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result = dns_adb_deletename(adb, &name2);
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check_result(result, "dns_adb_deletename name2");
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@@ -275,6 +440,29 @@ main(int argc, char **argv)
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if (handle != NULL)
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dns_adb_done(adb, &handle);
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/*
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* Look up a host that will be in the hints database
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*/
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result = dns_adb_lookup(adb, t2, lookup_callback, &name4,
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&name4, dns_rootname, now, &handle);
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if (result == ISC_R_SUCCESS) {
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check_result(handle->result, "handle->result");
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check_result(result, "dns_adb_lookup name4");
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dns_adb_dump(adb, stderr);
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dns_adb_dumphandle(adb, handle, stderr);
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} else {
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fprintf(stderr, "lookup of name4: %s\n",
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isc_result_totext(result));
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}
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dns_adb_dump(adb, stderr);
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if (handle != NULL) {
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dns_adb_dumphandle(adb, handle, stderr);
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dns_adb_done(adb, &handle);
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}
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isc_task_detach(&t1);
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isc_task_detach(&t2);
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@@ -284,7 +472,10 @@ main(int argc, char **argv)
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isc_app_run();
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dns_view_detach(&view);
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destroy_view();
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isc_socketmgr_destroy(&socketmgr);
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isc_timermgr_destroy(&timermgr);
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fprintf(stderr, "Destroying task manager\n");
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isc_taskmgr_destroy(&manager);
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