external/bsd/bind/dist/lib/dns/client.c
author msaitoh <msaitoh@NetBSD.org>
Fri, 26 Dec 2014 03:08:06 +0000
branchnetbsd-6-1
changeset 277066 8f6a14690a1a
parent 255810 2f38b0cef1f4
child 277224 77877e02910d
permissions -rw-r--r--
Pull up following revision(s) (requested by spz in ticket #1217): distrib/sets/lists/base/ad.mips64eb patch distrib/sets/lists/base/ad.mips64el patch distrib/sets/lists/base/md.amd64 patch distrib/sets/lists/base/md.sparc64 patch distrib/sets/lists/base/shl.mi patch distrib/sets/lists/comp/ad.mips64eb patch distrib/sets/lists/comp/ad.mips64el patch distrib/sets/lists/comp/md.amd64 patch distrib/sets/lists/comp/md.sparc64 patch distrib/sets/lists/comp/mi patch distrib/sets/lists/comp/shl.mi patch external/bsd/bind/Makefile.inc patch external/bsd/bind/dist/CHANGES patch external/bsd/bind/dist/COPYRIGHT patch external/bsd/bind/dist/FAQ patch external/bsd/bind/dist/FAQ.xml patch external/bsd/bind/dist/HISTORY patch external/bsd/bind/dist/Makefile.in patch external/bsd/bind/dist/README patch external/bsd/bind/dist/REDIRECT-NOTES delete external/bsd/bind/dist/acconfig.h patch external/bsd/bind/dist/aclocal.m4 patch external/bsd/bind/dist/config.guess patch external/bsd/bind/dist/config.h.in patch external/bsd/bind/dist/config.h.win32 patch external/bsd/bind/dist/config.sub patch external/bsd/bind/dist/configure patch external/bsd/bind/dist/configure.in patch external/bsd/bind/dist/isc-config.sh.1 patch external/bsd/bind/dist/isc-config.sh.docbook patch external/bsd/bind/dist/isc-config.sh.html patch external/bsd/bind/dist/isc-config.sh.in patch external/bsd/bind/dist/ltmain.sh patch external/bsd/bind/dist/srcid patch external/bsd/bind/dist/version patch external/bsd/bind/dist/bin/Makefile.in patch external/bsd/bind/dist/bin/check/Makefile.in patch external/bsd/bind/dist/bin/check/check-tool.c patch external/bsd/bind/dist/bin/check/named-checkconf.8 patch external/bsd/bind/dist/bin/check/named-checkconf.c patch external/bsd/bind/dist/bin/check/named-checkconf.docbook patch external/bsd/bind/dist/bin/check/named-checkconf.html patch external/bsd/bind/dist/bin/check/named-checkzone.8 patch external/bsd/bind/dist/bin/check/named-checkzone.c patch external/bsd/bind/dist/bin/check/named-checkzone.docbook patch external/bsd/bind/dist/bin/check/named-checkzone.html patch external/bsd/bind/dist/bin/check/win32/checktool.dsp delete external/bsd/bind/dist/bin/check/win32/namedcheckconf.dsp delete external/bsd/bind/dist/bin/check/win32/namedcheckconf.dsw delete external/bsd/bind/dist/bin/check/win32/namedcheckconf.mak delete external/bsd/bind/dist/bin/check/win32/namedcheckzone.dsp delete external/bsd/bind/dist/bin/check/win32/namedcheckzone.dsw delete external/bsd/bind/dist/bin/check/win32/namedcheckzone.mak delete external/bsd/bind/dist/bin/confgen/ddns-confgen.8 patch external/bsd/bind/dist/bin/confgen/ddns-confgen.c patch external/bsd/bind/dist/bin/confgen/ddns-confgen.docbook patch external/bsd/bind/dist/bin/confgen/ddns-confgen.html patch external/bsd/bind/dist/bin/confgen/keygen.c patch external/bsd/bind/dist/bin/confgen/rndc-confgen.8 patch external/bsd/bind/dist/bin/confgen/rndc-confgen.c patch external/bsd/bind/dist/bin/confgen/rndc-confgen.docbook patch external/bsd/bind/dist/bin/confgen/rndc-confgen.html patch external/bsd/bind/dist/bin/confgen/win32/confgentool.dsp delete external/bsd/bind/dist/bin/confgen/win32/ddnsconfgen.dsp delete external/bsd/bind/dist/bin/confgen/win32/ddnsconfgen.mak delete external/bsd/bind/dist/bin/confgen/win32/rndcconfgen.dsp delete external/bsd/bind/dist/bin/confgen/win32/rndcconfgen.mak delete external/bsd/bind/dist/bin/dig/Makefile.in patch external/bsd/bind/dist/bin/dig/dig.1 patch external/bsd/bind/dist/bin/dig/dig.c patch external/bsd/bind/dist/bin/dig/dig.docbook patch external/bsd/bind/dist/bin/dig/dig.html patch external/bsd/bind/dist/bin/dig/dighost.c patch external/bsd/bind/dist/bin/dig/host.1 patch external/bsd/bind/dist/bin/dig/host.c patch external/bsd/bind/dist/bin/dig/host.docbook patch external/bsd/bind/dist/bin/dig/host.html patch external/bsd/bind/dist/bin/dig/nslookup.1 patch external/bsd/bind/dist/bin/dig/nslookup.c patch external/bsd/bind/dist/bin/dig/nslookup.docbook patch external/bsd/bind/dist/bin/dig/nslookup.html patch external/bsd/bind/dist/bin/dig/include/dig/dig.h patch external/bsd/bind/dist/bin/dig/win32/dig.dsp delete external/bsd/bind/dist/bin/dig/win32/dig.mak delete external/bsd/bind/dist/bin/dig/win32/dighost.dsp delete external/bsd/bind/dist/bin/dig/win32/host.dsp delete external/bsd/bind/dist/bin/dig/win32/host.mak delete external/bsd/bind/dist/bin/dig/win32/nslookup.dsp delete external/bsd/bind/dist/bin/dig/win32/nslookup.mak delete external/bsd/bind/dist/bin/dnssec/Makefile.in patch external/bsd/bind/dist/bin/dnssec/dnssec-dsfromkey.8 patch external/bsd/bind/dist/bin/dnssec/dnssec-dsfromkey.c patch external/bsd/bind/dist/bin/dnssec/dnssec-dsfromkey.docbook patch external/bsd/bind/dist/bin/dnssec/dnssec-dsfromkey.html patch external/bsd/bind/dist/bin/dnssec/dnssec-importkey.8 new external/bsd/bind/dist/bin/dnssec/dnssec-importkey.c new external/bsd/bind/dist/bin/dnssec/dnssec-importkey.docbook new external/bsd/bind/dist/bin/dnssec/dnssec-importkey.html new external/bsd/bind/dist/bin/dnssec/dnssec-keyfromlabel.8 patch external/bsd/bind/dist/bin/dnssec/dnssec-keyfromlabel.c patch external/bsd/bind/dist/bin/dnssec/dnssec-keyfromlabel.docbook patch external/bsd/bind/dist/bin/dnssec/dnssec-keyfromlabel.html patch external/bsd/bind/dist/bin/dnssec/dnssec-keygen.8 patch external/bsd/bind/dist/bin/dnssec/dnssec-keygen.c patch external/bsd/bind/dist/bin/dnssec/dnssec-keygen.docbook patch external/bsd/bind/dist/bin/dnssec/dnssec-keygen.html patch external/bsd/bind/dist/bin/dnssec/dnssec-revoke.8 patch external/bsd/bind/dist/bin/dnssec/dnssec-revoke.c patch external/bsd/bind/dist/bin/dnssec/dnssec-revoke.docbook patch external/bsd/bind/dist/bin/dnssec/dnssec-revoke.html patch external/bsd/bind/dist/bin/dnssec/dnssec-settime.8 patch external/bsd/bind/dist/bin/dnssec/dnssec-settime.c patch external/bsd/bind/dist/bin/dnssec/dnssec-settime.docbook patch external/bsd/bind/dist/bin/dnssec/dnssec-settime.html patch external/bsd/bind/dist/bin/dnssec/dnssec-signzone.8 patch external/bsd/bind/dist/bin/dnssec/dnssec-signzone.c patch external/bsd/bind/dist/bin/dnssec/dnssec-signzone.docbook patch external/bsd/bind/dist/bin/dnssec/dnssec-signzone.html patch external/bsd/bind/dist/bin/dnssec/dnssec-verify.8 patch external/bsd/bind/dist/bin/dnssec/dnssec-verify.c patch external/bsd/bind/dist/bin/dnssec/dnssec-verify.docbook patch external/bsd/bind/dist/bin/dnssec/dnssec-verify.html patch external/bsd/bind/dist/bin/dnssec/dnssectool.c patch external/bsd/bind/dist/bin/dnssec/dnssectool.h patch external/bsd/bind/dist/bin/dnssec/win32/dnssectool.dsp delete external/bsd/bind/dist/bin/dnssec/win32/dsfromkey.dsp delete external/bsd/bind/dist/bin/dnssec/win32/dsfromkey.mak delete external/bsd/bind/dist/bin/dnssec/win32/keyfromlabel.dsp delete external/bsd/bind/dist/bin/dnssec/win32/keyfromlabel.mak delete external/bsd/bind/dist/bin/dnssec/win32/keygen.dsp delete external/bsd/bind/dist/bin/dnssec/win32/keygen.mak delete external/bsd/bind/dist/bin/dnssec/win32/nsupdate.dsp delete external/bsd/bind/dist/bin/dnssec/win32/nsupdate.dsw delete external/bsd/bind/dist/bin/dnssec/win32/revoke.dsp delete external/bsd/bind/dist/bin/dnssec/win32/revoke.mak delete external/bsd/bind/dist/bin/dnssec/win32/settime.dsp delete external/bsd/bind/dist/bin/dnssec/win32/settime.mak delete external/bsd/bind/dist/bin/dnssec/win32/signzone.dsp delete external/bsd/bind/dist/bin/dnssec/win32/signzone.mak delete external/bsd/bind/dist/bin/named/Makefile.in patch external/bsd/bind/dist/bin/named/bind.keys.h patch external/bsd/bind/dist/bin/named/bind9.ver3.xsl new external/bsd/bind/dist/bin/named/bind9.ver3.xsl.h new external/bsd/bind/dist/bin/named/bind9.xsl.h patch external/bsd/bind/dist/bin/named/builtin.c patch external/bsd/bind/dist/bin/named/client.c patch external/bsd/bind/dist/bin/named/config.c patch external/bsd/bind/dist/bin/named/control.c patch external/bsd/bind/dist/bin/named/controlconf.c patch external/bsd/bind/dist/bin/named/interfacemgr.c patch external/bsd/bind/dist/bin/named/log.c patch external/bsd/bind/dist/bin/named/logconf.c patch external/bsd/bind/dist/bin/named/lwaddr.c patch external/bsd/bind/dist/bin/named/lwdgnba.c patch external/bsd/bind/dist/bin/named/lwdgrbn.c patch external/bsd/bind/dist/bin/named/lwresd.8 patch external/bsd/bind/dist/bin/named/lwresd.c patch external/bsd/bind/dist/bin/named/lwresd.docbook patch external/bsd/bind/dist/bin/named/lwresd.html patch external/bsd/bind/dist/bin/named/main.c patch external/bsd/bind/dist/bin/named/named.8 patch external/bsd/bind/dist/bin/named/named.conf.5 patch external/bsd/bind/dist/bin/named/named.conf.docbook patch external/bsd/bind/dist/bin/named/named.conf.html patch external/bsd/bind/dist/bin/named/named.docbook patch external/bsd/bind/dist/bin/named/named.html patch external/bsd/bind/dist/bin/named/query.c patch external/bsd/bind/dist/bin/named/server.c patch external/bsd/bind/dist/bin/named/statschannel.c patch external/bsd/bind/dist/bin/named/tkeyconf.c patch external/bsd/bind/dist/bin/named/tsigconf.c patch external/bsd/bind/dist/bin/named/update.c patch external/bsd/bind/dist/bin/named/xfrout.c patch external/bsd/bind/dist/bin/named/zoneconf.c patch external/bsd/bind/dist/bin/named/include/named/client.h patch external/bsd/bind/dist/bin/named/include/named/globals.h patch external/bsd/bind/dist/bin/named/include/named/main.h patch external/bsd/bind/dist/bin/named/include/named/query.h patch external/bsd/bind/dist/bin/named/include/named/server.h patch external/bsd/bind/dist/bin/named/unix/dlz_dlopen_driver.c patch external/bsd/bind/dist/bin/named/unix/os.c patch external/bsd/bind/dist/bin/named/win32/named.dsp delete external/bsd/bind/dist/bin/named/win32/named.mak delete external/bsd/bind/dist/bin/nsupdate/Makefile.in patch external/bsd/bind/dist/bin/nsupdate/nsupdate.1 patch external/bsd/bind/dist/bin/nsupdate/nsupdate.c patch external/bsd/bind/dist/bin/nsupdate/nsupdate.docbook patch external/bsd/bind/dist/bin/nsupdate/nsupdate.html patch external/bsd/bind/dist/bin/nsupdate/win32/nsupdate.dsp delete external/bsd/bind/dist/bin/nsupdate/win32/nsupdate.mak delete external/bsd/bind/dist/bin/pkcs11/openssl-0.9.8s-patch delete external/bsd/bind/dist/bin/pkcs11/openssl-0.9.8za-patch new external/bsd/bind/dist/bin/pkcs11/openssl-1.0.0f-patch delete external/bsd/bind/dist/bin/pkcs11/openssl-1.0.0m-patch new external/bsd/bind/dist/bin/pkcs11/openssl-1.0.1h-patch new external/bsd/bind/dist/bin/pkcs11/pkcs11-destroy.docbook patch external/bsd/bind/dist/bin/pkcs11/pkcs11-keygen.docbook patch external/bsd/bind/dist/bin/pkcs11/pkcs11-list.docbook patch external/bsd/bind/dist/bin/pkcs11/win32/pk11destroy.dsp delete external/bsd/bind/dist/bin/pkcs11/win32/pk11destroy.mak delete external/bsd/bind/dist/bin/pkcs11/win32/pk11keygen.dsp delete external/bsd/bind/dist/bin/pkcs11/win32/pk11keygen.mak delete external/bsd/bind/dist/bin/pkcs11/win32/pk11list.dsp delete external/bsd/bind/dist/bin/pkcs11/win32/pk11list.mak delete external/bsd/bind/dist/bin/python/Makefile.in patch external/bsd/bind/dist/bin/python/dnssec-checkds.8 patch external/bsd/bind/dist/bin/python/dnssec-checkds.docbook patch external/bsd/bind/dist/bin/python/dnssec-checkds.html patch external/bsd/bind/dist/bin/python/dnssec-checkds.py.in patch external/bsd/bind/dist/bin/python/dnssec-coverage.8 new external/bsd/bind/dist/bin/python/dnssec-coverage.docbook new external/bsd/bind/dist/bin/python/dnssec-coverage.html new external/bsd/bind/dist/bin/python/dnssec-coverage.py.in new external/bsd/bind/dist/bin/rndc/rndc.8 patch external/bsd/bind/dist/bin/rndc/rndc.c patch external/bsd/bind/dist/bin/rndc/rndc.conf.5 patch external/bsd/bind/dist/bin/rndc/rndc.conf.docbook patch external/bsd/bind/dist/bin/rndc/rndc.conf.html patch external/bsd/bind/dist/bin/rndc/rndc.docbook patch external/bsd/bind/dist/bin/rndc/rndc.html patch external/bsd/bind/dist/bin/rndc/win32/rndc.dsp delete external/bsd/bind/dist/bin/rndc/win32/rndc.mak delete external/bsd/bind/dist/bin/rndc/win32/rndcutil.dsp delete external/bsd/bind/dist/bin/tests/Makefile.in patch external/bsd/bind/dist/bin/tests/adb_test.c patch external/bsd/bind/dist/bin/tests/backtrace_test.c patch external/bsd/bind/dist/bin/tests/byaddr_test.c patch external/bsd/bind/dist/bin/tests/byname_test.c patch external/bsd/bind/dist/bin/tests/db_test.c patch external/bsd/bind/dist/bin/tests/fsaccess_test.c patch external/bsd/bind/dist/bin/tests/hash_test.c patch external/bsd/bind/dist/bin/tests/log_test.c patch external/bsd/bind/dist/bin/tests/rdata_test.c patch external/bsd/bind/dist/bin/tests/rwlock_test.c patch external/bsd/bind/dist/bin/tests/shutdown_test.c patch external/bsd/bind/dist/bin/tests/sig0_test.c patch external/bsd/bind/dist/bin/tests/sock_test.c patch external/bsd/bind/dist/bin/tests/task_test.c patch external/bsd/bind/dist/bin/tests/timer_test.c patch external/bsd/bind/dist/bin/tests/zone_test.c patch external/bsd/bind/dist/bin/tests/atomic/t_atomic.c patch external/bsd/bind/dist/bin/tests/db/t_db.c patch external/bsd/bind/dist/bin/tests/dst/Kdh.+002+18602.key delete external/bsd/bind/dist/bin/tests/dst/Kdh.+002+18602.key.in new external/bsd/bind/dist/bin/tests/dst/Kdh.+002+18602.private delete external/bsd/bind/dist/bin/tests/dst/Kdh.+002+18602.private.in new external/bsd/bind/dist/bin/tests/dst/Kdh.+002+48957.key delete external/bsd/bind/dist/bin/tests/dst/Kdh.+002+48957.key.in new external/bsd/bind/dist/bin/tests/dst/Kdh.+002+48957.private delete external/bsd/bind/dist/bin/tests/dst/Kdh.+002+48957.private.in new external/bsd/bind/dist/bin/tests/dst/Ktest.+001+00002.key delete external/bsd/bind/dist/bin/tests/dst/Ktest.+001+00002.key.in new external/bsd/bind/dist/bin/tests/dst/Ktest.+001+54622.key delete external/bsd/bind/dist/bin/tests/dst/Ktest.+001+54622.key.in new external/bsd/bind/dist/bin/tests/dst/Ktest.+001+54622.private delete external/bsd/bind/dist/bin/tests/dst/Ktest.+001+54622.private.in new external/bsd/bind/dist/bin/tests/dst/Ktest.+003+23616.key delete external/bsd/bind/dist/bin/tests/dst/Ktest.+003+23616.key.in new external/bsd/bind/dist/bin/tests/dst/Ktest.+003+23616.private delete external/bsd/bind/dist/bin/tests/dst/Ktest.+003+23616.private.in new external/bsd/bind/dist/bin/tests/dst/Ktest.+003+49667.key delete external/bsd/bind/dist/bin/tests/dst/Ktest.+003+49667.key.in new external/bsd/bind/dist/bin/tests/dst/Makefile.in patch external/bsd/bind/dist/bin/tests/dst/dst_2_data delete external/bsd/bind/dist/bin/tests/dst/dst_2_data.in new external/bsd/bind/dist/bin/tests/dst/dst_test.c patch external/bsd/bind/dist/bin/tests/dst/gsstest.c patch external/bsd/bind/dist/bin/tests/dst/t2_data_1 delete external/bsd/bind/dist/bin/tests/dst/t2_data_1.in new external/bsd/bind/dist/bin/tests/dst/t2_data_2 delete external/bsd/bind/dist/bin/tests/dst/t2_data_2.in new external/bsd/bind/dist/bin/tests/dst/t2_dsasig delete external/bsd/bind/dist/bin/tests/dst/t2_dsasig.in new external/bsd/bind/dist/bin/tests/dst/t2_rsasig delete external/bsd/bind/dist/bin/tests/dst/t2_rsasig.in new external/bsd/bind/dist/bin/tests/dst/t_dst.c patch external/bsd/bind/dist/bin/tests/hashes/t_hashes.c patch external/bsd/bind/dist/bin/tests/master/t_master.c patch external/bsd/bind/dist/bin/tests/mem/t_mem.c patch external/bsd/bind/dist/bin/tests/names/dns_name_hash_data patch external/bsd/bind/dist/bin/tests/names/t_names.c patch external/bsd/bind/dist/bin/tests/rbt/t_rbt.c patch external/bsd/bind/dist/bin/tests/resolver/t_resolver.c patch external/bsd/bind/dist/bin/tests/sockaddr/t_sockaddr.c patch external/bsd/bind/dist/bin/tests/system/Makefile.in patch external/bsd/bind/dist/bin/tests/system/README patch external/bsd/bind/dist/bin/tests/system/ans.pl patch external/bsd/bind/dist/bin/tests/system/cleanall.sh patch external/bsd/bind/dist/bin/tests/system/conf.sh.in patch external/bsd/bind/dist/bin/tests/system/digcomp.pl patch external/bsd/bind/dist/bin/tests/system/genzone.sh patch external/bsd/bind/dist/bin/tests/system/ifconfig.sh patch external/bsd/bind/dist/bin/tests/system/run.sh patch external/bsd/bind/dist/bin/tests/system/runall.sh patch external/bsd/bind/dist/bin/tests/system/setup.sh patch external/bsd/bind/dist/bin/tests/system/start.pl patch external/bsd/bind/dist/bin/tests/system/testcrypto.sh new external/bsd/bind/dist/bin/tests/system/testsock.pl patch external/bsd/bind/dist/bin/tests/system/testsock6.pl patch external/bsd/bind/dist/bin/tests/system/acl/clean.sh patch external/bsd/bind/dist/bin/tests/system/acl/setup.sh patch external/bsd/bind/dist/bin/tests/system/acl/tests.sh patch external/bsd/bind/dist/bin/tests/system/acl/ns2/named5.conf new external/bsd/bind/dist/bin/tests/system/additional/clean.sh new external/bsd/bind/dist/bin/tests/system/additional/setup.sh new external/bsd/bind/dist/bin/tests/system/additional/tests.sh new external/bsd/bind/dist/bin/tests/system/addzone/clean.sh patch external/bsd/bind/dist/bin/tests/system/addzone/setup.sh patch external/bsd/bind/dist/bin/tests/system/addzone/tests.sh patch external/bsd/bind/dist/bin/tests/system/addzone/ns1/inlineslave.db new external/bsd/bind/dist/bin/tests/system/addzone/ns1/named.conf new external/bsd/bind/dist/bin/tests/system/addzone/ns2/added.db patch external/bsd/bind/dist/bin/tests/system/addzone/ns2/inline.db new external/bsd/bind/dist/bin/tests/system/allow_query/tests.sh patch external/bsd/bind/dist/bin/tests/system/allow_query/ns2/named57.conf new external/bsd/bind/dist/bin/tests/system/autosign/clean.sh patch external/bsd/bind/dist/bin/tests/system/autosign/prereq.sh patch external/bsd/bind/dist/bin/tests/system/autosign/setup.sh patch external/bsd/bind/dist/bin/tests/system/autosign/tests.sh patch external/bsd/bind/dist/bin/tests/system/autosign/ns1/keygen.sh patch external/bsd/bind/dist/bin/tests/system/autosign/ns2/keygen.sh patch external/bsd/bind/dist/bin/tests/system/autosign/ns3/keygen.sh patch external/bsd/bind/dist/bin/tests/system/builtin/Makefile.in new external/bsd/bind/dist/bin/tests/system/builtin/clean.sh new external/bsd/bind/dist/bin/tests/system/builtin/gethostname.c new external/bsd/bind/dist/bin/tests/system/builtin/tests.sh patch external/bsd/bind/dist/bin/tests/system/builtin/ns2/named.conf new external/bsd/bind/dist/bin/tests/system/builtin/ns3/named.conf new external/bsd/bind/dist/bin/tests/system/cacheclean/tests.sh patch external/bsd/bind/dist/bin/tests/system/cacheclean/ns1/example.db patch external/bsd/bind/dist/bin/tests/system/case/clean.sh new external/bsd/bind/dist/bin/tests/system/case/tests.sh new external/bsd/bind/dist/bin/tests/system/case/ns1/example.db new external/bsd/bind/dist/bin/tests/system/case/ns1/named.conf new external/bsd/bind/dist/bin/tests/system/case/ns2/named.conf new external/bsd/bind/dist/bin/tests/system/checkconf/altdb.conf new external/bsd/bind/dist/bin/tests/system/checkconf/bad-also-notify.conf new external/bsd/bind/dist/bin/tests/system/checkconf/bad-dnssec.conf new external/bsd/bind/dist/bin/tests/system/checkconf/bad-hint.conf new external/bsd/bind/dist/bin/tests/system/checkconf/bad-inline-slave.conf new external/bsd/bind/dist/bin/tests/system/checkconf/bad-many.conf new external/bsd/bind/dist/bin/tests/system/checkconf/bad-master-request-ixfr.conf new external/bsd/bind/dist/bin/tests/system/checkconf/bad-noddns.conf new external/bsd/bind/dist/bin/tests/system/checkconf/bad-tsig.conf new external/bsd/bind/dist/bin/tests/system/checkconf/bad.conf delete external/bsd/bind/dist/bin/tests/system/checkconf/badtsig.conf delete 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external/bsd/bind/dist/unit/atf-src/atf-c/defs.h.in patch external/bsd/bind/dist/unit/atf-src/atf-c/error.c patch external/bsd/bind/dist/unit/atf-src/atf-c/error.h patch external/bsd/bind/dist/unit/atf-src/atf-c/error_test.c patch external/bsd/bind/dist/unit/atf-src/atf-c/macros.h patch external/bsd/bind/dist/unit/atf-src/atf-c/macros_h_test.c patch external/bsd/bind/dist/unit/atf-src/atf-c/macros_test.c patch external/bsd/bind/dist/unit/atf-src/atf-c/pkg_config_test.sh patch external/bsd/bind/dist/unit/atf-src/atf-c/tc.c patch external/bsd/bind/dist/unit/atf-src/atf-c/tc.h patch external/bsd/bind/dist/unit/atf-src/atf-c/tc_test.c patch external/bsd/bind/dist/unit/atf-src/atf-c/tp.c patch external/bsd/bind/dist/unit/atf-src/atf-c/tp.h patch external/bsd/bind/dist/unit/atf-src/atf-c/tp_test.c patch external/bsd/bind/dist/unit/atf-src/atf-c/unused_test.c new external/bsd/bind/dist/unit/atf-src/atf-c/utils.c patch external/bsd/bind/dist/unit/atf-src/atf-c/utils.h patch 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external/bsd/bind/dist/unit/atf-src/atf-c/detail/map.c patch external/bsd/bind/dist/unit/atf-src/atf-c/detail/map.h patch external/bsd/bind/dist/unit/atf-src/atf-c/detail/map_test.c patch external/bsd/bind/dist/unit/atf-src/atf-c/detail/process.c patch external/bsd/bind/dist/unit/atf-src/atf-c/detail/process.h patch external/bsd/bind/dist/unit/atf-src/atf-c/detail/process_helpers.c patch external/bsd/bind/dist/unit/atf-src/atf-c/detail/process_test.c patch external/bsd/bind/dist/unit/atf-src/atf-c/detail/sanity.h patch external/bsd/bind/dist/unit/atf-src/atf-c/detail/sanity_test.c patch external/bsd/bind/dist/unit/atf-src/atf-c/detail/test_helpers.c patch external/bsd/bind/dist/unit/atf-src/atf-c/detail/test_helpers.h patch external/bsd/bind/dist/unit/atf-src/atf-c/detail/test_helpers_test.c delete external/bsd/bind/dist/unit/atf-src/atf-c/detail/text.c patch external/bsd/bind/dist/unit/atf-src/atf-c/detail/text.h patch external/bsd/bind/dist/unit/atf-src/atf-c/detail/text_test.c patch external/bsd/bind/dist/unit/atf-src/atf-c/detail/tp_main.c patch external/bsd/bind/dist/unit/atf-src/atf-c/detail/user.c patch external/bsd/bind/dist/unit/atf-src/atf-c/detail/user.h patch external/bsd/bind/dist/unit/atf-src/atf-c/detail/user_test.c patch external/bsd/bind/dist/unit/atf-src/atf-c++/Kyuafile new external/bsd/bind/dist/unit/atf-src/atf-c++/Makefile.am.inc patch external/bsd/bind/dist/unit/atf-src/atf-c++/atf-c++-api.3 patch external/bsd/bind/dist/unit/atf-src/atf-c++/atf-c++.m4 new external/bsd/bind/dist/unit/atf-src/atf-c++/check.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/check.hpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/check_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/config.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/config.hpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/config_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/macros.hpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/macros_hpp_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/macros_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/noncopyable.hpp new external/bsd/bind/dist/unit/atf-src/atf-c++/pkg_config_test.sh patch external/bsd/bind/dist/unit/atf-src/atf-c++/tests.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/tests.hpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/tests_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/unused_test.cpp new external/bsd/bind/dist/unit/atf-src/atf-c++/utils.cpp new external/bsd/bind/dist/unit/atf-src/atf-c++/utils.hpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/utils_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/Atffile patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/Kyuafile new external/bsd/bind/dist/unit/atf-src/atf-c++/detail/Makefile.am.inc patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/application.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/application.hpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/application_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/auto_array.hpp new external/bsd/bind/dist/unit/atf-src/atf-c++/detail/auto_array_test.cpp new external/bsd/bind/dist/unit/atf-src/atf-c++/detail/env.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/env.hpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/env_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/exceptions.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/exceptions.hpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/exceptions_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/expand.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/expand.hpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/expand_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/fs.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/fs.hpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/fs_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/parser.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/parser.hpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/parser_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/process.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/process.hpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/process_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/sanity.hpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/test_helpers.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/test_helpers.hpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/text.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/text.hpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/text_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/ui.cpp patch external/bsd/bind/dist/unit/atf-src/atf-c++/detail/ui.hpp patch external/bsd/bind/dist/unit/atf-src/atf-config/Kyuafile new external/bsd/bind/dist/unit/atf-src/atf-config/Makefile.am.inc patch external/bsd/bind/dist/unit/atf-src/atf-config/atf-config.1 patch external/bsd/bind/dist/unit/atf-src/atf-config/atf-config.cpp patch external/bsd/bind/dist/unit/atf-src/atf-config/integration_test.sh patch external/bsd/bind/dist/unit/atf-src/atf-report/Kyuafile new external/bsd/bind/dist/unit/atf-src/atf-report/Makefile.am.inc patch external/bsd/bind/dist/unit/atf-src/atf-report/atf-report.1 patch external/bsd/bind/dist/unit/atf-src/atf-report/atf-report.cpp patch external/bsd/bind/dist/unit/atf-src/atf-report/fail_helper.cpp patch external/bsd/bind/dist/unit/atf-src/atf-report/integration_test.sh patch external/bsd/bind/dist/unit/atf-src/atf-report/misc_helpers.cpp patch external/bsd/bind/dist/unit/atf-src/atf-report/pass_helper.cpp patch external/bsd/bind/dist/unit/atf-src/atf-report/reader.cpp patch external/bsd/bind/dist/unit/atf-src/atf-report/reader.hpp patch external/bsd/bind/dist/unit/atf-src/atf-report/reader_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-report/tests-results.css patch external/bsd/bind/dist/unit/atf-src/atf-report/tests-results.dtd patch external/bsd/bind/dist/unit/atf-src/atf-report/tests-results.xsl patch external/bsd/bind/dist/unit/atf-src/atf-run/Kyuafile new external/bsd/bind/dist/unit/atf-src/atf-run/Makefile.am.inc patch external/bsd/bind/dist/unit/atf-src/atf-run/atf-run.1 patch external/bsd/bind/dist/unit/atf-src/atf-run/atf-run.cpp patch external/bsd/bind/dist/unit/atf-src/atf-run/atffile.cpp patch external/bsd/bind/dist/unit/atf-src/atf-run/atffile.hpp patch external/bsd/bind/dist/unit/atf-src/atf-run/atffile_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-run/config.cpp patch external/bsd/bind/dist/unit/atf-src/atf-run/config_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-run/fs.cpp patch external/bsd/bind/dist/unit/atf-src/atf-run/fs.hpp patch external/bsd/bind/dist/unit/atf-src/atf-run/fs_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-run/integration_test.sh patch external/bsd/bind/dist/unit/atf-src/atf-run/io.cpp patch external/bsd/bind/dist/unit/atf-src/atf-run/io.hpp patch external/bsd/bind/dist/unit/atf-src/atf-run/io_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-run/misc_helpers.cpp patch external/bsd/bind/dist/unit/atf-src/atf-run/pass_helper.cpp patch external/bsd/bind/dist/unit/atf-src/atf-run/requirements.cpp patch external/bsd/bind/dist/unit/atf-src/atf-run/requirements_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-run/several_tcs_helper.c patch external/bsd/bind/dist/unit/atf-src/atf-run/signals.cpp patch external/bsd/bind/dist/unit/atf-src/atf-run/signals.hpp patch external/bsd/bind/dist/unit/atf-src/atf-run/signals_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-run/test-program.cpp patch external/bsd/bind/dist/unit/atf-src/atf-run/test_program_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-run/timer.cpp patch external/bsd/bind/dist/unit/atf-src/atf-run/timer.hpp patch external/bsd/bind/dist/unit/atf-src/atf-run/user.cpp patch external/bsd/bind/dist/unit/atf-src/atf-run/user.hpp patch external/bsd/bind/dist/unit/atf-src/atf-run/user_test.cpp patch external/bsd/bind/dist/unit/atf-src/atf-run/zero_tcs_helper.c patch external/bsd/bind/dist/unit/atf-src/atf-run/share/atf-run.hooks patch external/bsd/bind/dist/unit/atf-src/atf-sh/Kyuafile new external/bsd/bind/dist/unit/atf-src/atf-sh/Makefile.am.inc patch external/bsd/bind/dist/unit/atf-src/atf-sh/atf-check.1 patch external/bsd/bind/dist/unit/atf-src/atf-sh/atf-check.cpp patch external/bsd/bind/dist/unit/atf-src/atf-sh/atf-check_test.sh patch external/bsd/bind/dist/unit/atf-src/atf-sh/atf-sh-api.3 patch external/bsd/bind/dist/unit/atf-src/atf-sh/atf-sh.cpp patch external/bsd/bind/dist/unit/atf-src/atf-sh/atf-sh.m4 new external/bsd/bind/dist/unit/atf-src/atf-sh/atf-sh.pc.in new external/bsd/bind/dist/unit/atf-src/atf-sh/atf_check_test.sh patch external/bsd/bind/dist/unit/atf-src/atf-sh/config_test.sh patch external/bsd/bind/dist/unit/atf-src/atf-sh/libatf-sh.subr patch external/bsd/bind/dist/unit/atf-src/atf-sh/misc_helpers.sh patch external/bsd/bind/dist/unit/atf-src/atf-sh/normalize_test.sh patch external/bsd/bind/dist/unit/atf-src/atf-sh/tc_test.sh patch external/bsd/bind/dist/unit/atf-src/atf-sh/tp_test.sh patch external/bsd/bind/dist/unit/atf-src/atf-version/Makefile.am.inc patch external/bsd/bind/dist/unit/atf-src/atf-version/atf-version.1 patch external/bsd/bind/dist/unit/atf-src/atf-version/atf-version.cpp patch external/bsd/bind/dist/unit/atf-src/atf-version/generate-revision.sh patch external/bsd/bind/dist/unit/atf-src/bootstrap/Makefile.am.inc patch external/bsd/bind/dist/unit/atf-src/bootstrap/h_app_empty.cpp patch external/bsd/bind/dist/unit/atf-src/bootstrap/h_app_opts_args.cpp patch external/bsd/bind/dist/unit/atf-src/bootstrap/h_tp_atf_check_sh.sh patch external/bsd/bind/dist/unit/atf-src/bootstrap/h_tp_basic_cpp.cpp patch external/bsd/bind/dist/unit/atf-src/bootstrap/h_tp_basic_sh.sh patch external/bsd/bind/dist/unit/atf-src/bootstrap/package.m4 patch external/bsd/bind/dist/unit/atf-src/bootstrap/t_application_help.at patch external/bsd/bind/dist/unit/atf-src/bootstrap/t_application_opts_args.atpatch external/bsd/bind/dist/unit/atf-src/bootstrap/t_atf_config.at patch external/bsd/bind/dist/unit/atf-src/bootstrap/t_atf_run.at patch external/bsd/bind/dist/unit/atf-src/bootstrap/t_subr_atf_check.at patch external/bsd/bind/dist/unit/atf-src/bootstrap/t_test_program_compare.at patch external/bsd/bind/dist/unit/atf-src/bootstrap/t_test_program_filter.at patch external/bsd/bind/dist/unit/atf-src/bootstrap/t_test_program_list.at patch external/bsd/bind/dist/unit/atf-src/bootstrap/t_test_program_run.at patch external/bsd/bind/dist/unit/atf-src/bootstrap/testsuite patch external/bsd/bind/dist/unit/atf-src/bootstrap/testsuite.at patch external/bsd/bind/dist/unit/atf-src/doc/Makefile.am.inc patch external/bsd/bind/dist/unit/atf-src/doc/atf-formats.5 patch external/bsd/bind/dist/unit/atf-src/doc/atf-test-case.4 patch external/bsd/bind/dist/unit/atf-src/doc/atf-test-program.1 patch external/bsd/bind/dist/unit/atf-src/doc/atf.7.in patch external/bsd/bind/dist/unit/atf-src/m4/compiler-flags.m4 patch external/bsd/bind/dist/unit/atf-src/m4/cxx-std-funcs.m4 patch external/bsd/bind/dist/unit/atf-src/m4/developer-mode.m4 patch external/bsd/bind/dist/unit/atf-src/m4/module-application.m4 patch external/bsd/bind/dist/unit/atf-src/m4/module-defs.m4 patch external/bsd/bind/dist/unit/atf-src/m4/module-env.m4 patch external/bsd/bind/dist/unit/atf-src/m4/module-fs.m4 patch external/bsd/bind/dist/unit/atf-src/m4/module-sanity.m4 patch external/bsd/bind/dist/unit/atf-src/m4/module-signals.m4 patch external/bsd/bind/dist/unit/atf-src/test-programs/Atffile patch external/bsd/bind/dist/unit/atf-src/test-programs/Kyuafile new external/bsd/bind/dist/unit/atf-src/test-programs/Makefile.am.inc patch external/bsd/bind/dist/unit/atf-src/test-programs/c_helpers.c patch external/bsd/bind/dist/unit/atf-src/test-programs/config_test.sh patch external/bsd/bind/dist/unit/atf-src/test-programs/cpp_helpers.cpp patch external/bsd/bind/dist/unit/atf-src/test-programs/expect_test.sh patch external/bsd/bind/dist/unit/atf-src/test-programs/fork_test.sh delete external/bsd/bind/dist/unit/atf-src/test-programs/meta_data_test.sh patch external/bsd/bind/dist/unit/atf-src/test-programs/result_test.sh patch external/bsd/bind/dist/unit/atf-src/test-programs/sh_helpers.sh patch external/bsd/bind/dist/unit/atf-src/test-programs/srcdir_test.sh patch external/bsd/bind/dist/win32utils/BINDBuild.dsw delete external/bsd/bind/dist/win32utils/BuildAll.bat delete external/bsd/bind/dist/win32utils/BuildPost.bat delete external/bsd/bind/dist/win32utils/BuildSetup.bat delete external/bsd/bind/dist/win32utils/SetupLibs.bat delete external/bsd/bind/dist/win32utils/dnsheadergen.bat delete external/bsd/bind/dist/win32utils/makedefs.pl delete external/bsd/bind/dist/win32utils/makeversion.pl delete external/bsd/bind/dist/win32utils/setpk11provider.pl delete external/bsd/bind/dist/win32utils/updatelibxml2.pl delete external/bsd/bind/dist/win32utils/updateopenssl.pl delete external/bsd/bind/dist/win32utils/win32-build.txt delete external/bsd/bind/include/config.h patch external/bsd/bind/include/dns/code.h patch external/bsd/bind/include/dns/enumclass.h patch external/bsd/bind/include/dns/enumtype.h patch external/bsd/bind/include/dns/rdatastruct.h patch external/bsd/bind/include/irs/netdb.h new external/bsd/bind/include/irs/platform.h new external/bsd/bind/include/isc/platform.h patch external/bsd/bind/include/lwres/netdb.h patch external/bsd/bind/include/lwres/platform.h patch external/bsd/bind/lib/Makefile patch external/bsd/bind/lib/libbind9/Makefile patch external/bsd/bind/lib/libbind9/shlib_version patch external/bsd/bind/lib/libdns/Makefile patch external/bsd/bind/lib/libdns/shlib_version patch external/bsd/bind/lib/libirs/Makefile new external/bsd/bind/lib/libirs/shlib_version new external/bsd/bind/lib/libisc/Makefile patch external/bsd/bind/lib/libisc/shlib_version patch external/bsd/bind/lib/libisccc/Makefile patch external/bsd/bind/lib/libisccc/shlib_version patch external/bsd/bind/lib/libisccfg/Makefile patch external/bsd/bind/lib/libisccfg/shlib_version patch external/bsd/bind/lib/liblwres/shlib_version patch Update bind to 9.9.6-P1. CVE-2014-8500.

/*	$NetBSD: client.c,v 1.3.4.1.6.1 2014/12/26 03:08:32 msaitoh Exp $	*/

/*
 * Copyright (C) 2009-2013  Internet Systems Consortium, Inc. ("ISC")
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

/* Id: client.c,v 1.14 2011/03/12 04:59:47 tbox Exp  */

#include <config.h>

#include <stddef.h>

#include <isc/app.h>
#include <isc/mem.h>
#include <isc/mutex.h>
#include <isc/sockaddr.h>
#include <isc/socket.h>
#include <isc/task.h>
#include <isc/timer.h>
#include <isc/util.h>

#include <dns/adb.h>
#include <dns/client.h>
#include <dns/db.h>
#include <dns/dispatch.h>
#include <dns/events.h>
#include <dns/forward.h>
#include <dns/keytable.h>
#include <dns/message.h>
#include <dns/name.h>
#include <dns/rdata.h>
#include <dns/rdatalist.h>
#include <dns/rdataset.h>
#include <dns/rdatatype.h>
#include <dns/rdatasetiter.h>
#include <dns/rdatastruct.h>
#include <dns/request.h>
#include <dns/resolver.h>
#include <dns/result.h>
#include <dns/tsec.h>
#include <dns/tsig.h>
#include <dns/view.h>

#include <dst/dst.h>

#define DNS_CLIENT_MAGIC		ISC_MAGIC('D', 'N', 'S', 'c')
#define DNS_CLIENT_VALID(c)		ISC_MAGIC_VALID(c, DNS_CLIENT_MAGIC)

#define RCTX_MAGIC			ISC_MAGIC('R', 'c', 't', 'x')
#define RCTX_VALID(c)			ISC_MAGIC_VALID(c, RCTX_MAGIC)

#define REQCTX_MAGIC			ISC_MAGIC('R', 'q', 'c', 'x')
#define REQCTX_VALID(c)			ISC_MAGIC_VALID(c, REQCTX_MAGIC)

#define UCTX_MAGIC			ISC_MAGIC('U', 'c', 't', 'x')
#define UCTX_VALID(c)			ISC_MAGIC_VALID(c, UCTX_MAGIC)

#define MAX_RESTARTS 16

/*%
 * DNS client object
 */
struct dns_client {
	/* Unlocked */
	unsigned int			magic;
	unsigned int			attributes;
	isc_mutex_t			lock;
	isc_mem_t			*mctx;
	isc_appctx_t			*actx;
	isc_taskmgr_t			*taskmgr;
	isc_task_t			*task;
	isc_socketmgr_t			*socketmgr;
	isc_timermgr_t			*timermgr;
	dns_dispatchmgr_t		*dispatchmgr;
	dns_dispatch_t			*dispatchv4;
	dns_dispatch_t			*dispatchv6;

	unsigned int			update_timeout;
	unsigned int			update_udptimeout;
	unsigned int			update_udpretries;
	unsigned int			find_timeout;
	unsigned int			find_udpretries;

	/* Locked */
	unsigned int			references;
	dns_viewlist_t			viewlist;
	ISC_LIST(struct resctx)		resctxs;
	ISC_LIST(struct reqctx)		reqctxs;
	ISC_LIST(struct updatectx)	updatectxs;
};

/*%
 * Timeout/retry constants for dynamic update borrowed from nsupdate
 */
#define DEF_UPDATE_TIMEOUT	300
#define MIN_UPDATE_TIMEOUT	30
#define DEF_UPDATE_UDPTIMEOUT	3
#define DEF_UPDATE_UDPRETRIES	3

#define DEF_FIND_TIMEOUT	5
#define DEF_FIND_UDPRETRIES	3

#define DNS_CLIENTATTR_OWNCTX			0x01

#define DNS_CLIENTVIEW_NAME			"dnsclient"

/*%
 * Internal state for a single name resolution procedure
 */
typedef struct resctx {
	/* Unlocked */
	unsigned int		magic;
	isc_mutex_t		lock;
	dns_client_t		*client;
	isc_boolean_t		want_dnssec;

	/* Locked */
	ISC_LINK(struct resctx)	link;
	isc_task_t		*task;
	dns_view_t		*view;
	unsigned int		restarts;
	dns_fixedname_t		name;
	dns_rdatatype_t		type;
	dns_fetch_t		*fetch;
	dns_namelist_t		namelist;
	isc_result_t		result;
	dns_clientresevent_t	*event;
	isc_boolean_t		canceled;
	dns_rdataset_t		*rdataset;
	dns_rdataset_t		*sigrdataset;
} resctx_t;

/*%
 * Argument of an internal event for synchronous name resolution.
 */
typedef struct resarg {
	/* Unlocked */
	isc_appctx_t		*actx;
	dns_client_t		*client;
	isc_mutex_t		lock;

	/* Locked */
	isc_result_t		result;
	isc_result_t		vresult;
	dns_namelist_t		*namelist;
	dns_clientrestrans_t	*trans;
	isc_boolean_t		canceled;
} resarg_t;

/*%
 * Internal state for a single DNS request
 */
typedef struct reqctx {
	/* Unlocked */
	unsigned int		magic;
	isc_mutex_t		lock;
	dns_client_t		*client;
	unsigned int		parseoptions;

	/* Locked */
	ISC_LINK(struct reqctx)	link;
	isc_boolean_t		canceled;
	dns_tsigkey_t		*tsigkey;
	dns_request_t		*request;
	dns_clientreqevent_t	*event;
} reqctx_t;

/*%
 * Argument of an internal event for synchronous DNS request.
 */
typedef struct reqarg {
	/* Unlocked */
	isc_appctx_t		*actx;
	dns_client_t		*client;
	isc_mutex_t		lock;

	/* Locked */
	isc_result_t		result;
	dns_clientreqtrans_t	*trans;
	isc_boolean_t		canceled;
} reqarg_t;

/*%
 * Argument of an internal event for synchronous name resolution.
 */
typedef struct updatearg {
	/* Unlocked */
	isc_appctx_t		*actx;
	dns_client_t		*client;
	isc_mutex_t		lock;

	/* Locked */
	isc_result_t		result;
	dns_clientupdatetrans_t	*trans;
	isc_boolean_t		canceled;
} updatearg_t;

/*%
 * Internal state for a single dynamic update procedure
 */
typedef struct updatectx {
	/* Unlocked */
	unsigned int			magic;
	isc_mutex_t			lock;
	dns_client_t			*client;

	/* Locked */
	dns_request_t			*updatereq;
	dns_request_t			*soareq;
	dns_clientrestrans_t		*restrans;
	dns_clientrestrans_t		*restrans2;
	isc_boolean_t			canceled;

	/* Task Locked */
	ISC_LINK(struct updatectx) 	link;
	dns_clientupdatestate_t		state;
	dns_rdataclass_t		rdclass;
	dns_view_t			*view;
	dns_message_t			*updatemsg;
	dns_message_t			*soaquery;
	dns_clientupdateevent_t		*event;
	dns_tsigkey_t			*tsigkey;
	dst_key_t			*sig0key;
	dns_name_t			*firstname;
	dns_name_t			soaqname;
	dns_fixedname_t			zonefname;
	dns_name_t			*zonename;
	isc_sockaddrlist_t		servers;
	unsigned int			nservers;
	isc_sockaddr_t			*currentserver;
	struct updatectx		*bp4;
	struct updatectx		*bp6;
} updatectx_t;

static isc_result_t request_soa(updatectx_t *uctx);
static void client_resfind(resctx_t *rctx, dns_fetchevent_t *event);
static isc_result_t send_update(updatectx_t *uctx);

static isc_result_t
getudpdispatch(int family, dns_dispatchmgr_t *dispatchmgr,
	       isc_socketmgr_t *socketmgr, isc_taskmgr_t *taskmgr,
	       isc_boolean_t is_shared, dns_dispatch_t **dispp,
	       isc_sockaddr_t *localaddr)
{
	unsigned int attrs, attrmask;
	dns_dispatch_t *disp;
	unsigned buffersize, maxbuffers, maxrequests, buckets, increment;
	isc_result_t result;
	isc_sockaddr_t anyaddr;

	attrs = 0;
	attrs |= DNS_DISPATCHATTR_UDP;
	switch (family) {
	case AF_INET:
		attrs |= DNS_DISPATCHATTR_IPV4;
		break;
	case AF_INET6:
		attrs |= DNS_DISPATCHATTR_IPV6;
		break;
	default:
		INSIST(0);
	}
	attrmask = 0;
	attrmask |= DNS_DISPATCHATTR_UDP;
	attrmask |= DNS_DISPATCHATTR_TCP;
	attrmask |= DNS_DISPATCHATTR_IPV4;
	attrmask |= DNS_DISPATCHATTR_IPV6;

	if (localaddr == NULL) {
		localaddr = &anyaddr;
		isc_sockaddr_anyofpf(localaddr, family);
	}

	buffersize = 4096;
	maxbuffers = is_shared ? 1000 : 8;
	maxrequests = 32768;
	buckets = is_shared ? 16411 : 3;
	increment = is_shared ? 16433 : 5;

	disp = NULL;
	result = dns_dispatch_getudp(dispatchmgr, socketmgr,
				     taskmgr, localaddr,
				     buffersize, maxbuffers, maxrequests,
				     buckets, increment,
				     attrs, attrmask, &disp);
	if (result == ISC_R_SUCCESS)
		*dispp = disp;

	return (result);
}

static isc_result_t
dns_client_createview(isc_mem_t *mctx, dns_rdataclass_t rdclass,
		      unsigned int options, isc_taskmgr_t *taskmgr,
		      unsigned int ntasks, isc_socketmgr_t *socketmgr,
		      isc_timermgr_t *timermgr, dns_dispatchmgr_t *dispatchmgr,
		      dns_dispatch_t *dispatchv4, dns_dispatch_t *dispatchv6,
		      dns_view_t **viewp)
{
	isc_result_t result;
	dns_view_t *view = NULL;
	const char *dbtype;

	result = dns_view_create(mctx, rdclass, DNS_CLIENTVIEW_NAME, &view);
	if (result != ISC_R_SUCCESS)
		return (result);

	/* Initialize view security roots */
	result = dns_view_initsecroots(view, mctx);
	if (result != ISC_R_SUCCESS) {
		dns_view_detach(&view);
		return (result);
	}

	result = dns_view_createresolver(view, taskmgr, ntasks, 1, socketmgr,
					 timermgr, 0, dispatchmgr,
					 dispatchv4, dispatchv6);
	if (result != ISC_R_SUCCESS) {
		dns_view_detach(&view);
		return (result);
	}

	/*
	 * Set cache DB.
	 * XXX: it may be better if specific DB implementations can be
	 * specified via some configuration knob.
	 */
	if ((options & DNS_CLIENTCREATEOPT_USECACHE) != 0)
		dbtype = "rbt";
	else
		dbtype = "ecdb";
	result = dns_db_create(mctx, dbtype, dns_rootname, dns_dbtype_cache,
			       rdclass, 0, NULL, &view->cachedb);
	if (result != ISC_R_SUCCESS) {
		dns_view_detach(&view);
		return (result);
	}

	*viewp = view;
	return (ISC_R_SUCCESS);
}

isc_result_t
dns_client_create(dns_client_t **clientp, unsigned int options) {
	isc_result_t result;
	isc_mem_t *mctx = NULL;
	isc_appctx_t *actx = NULL;
	isc_taskmgr_t *taskmgr = NULL;
	isc_socketmgr_t *socketmgr = NULL;
	isc_timermgr_t *timermgr = NULL;
#if 0
	/* XXXMPA add debug logging support */
	isc_log_t *lctx = NULL;
	isc_logconfig_t *logconfig = NULL;
	unsigned int logdebuglevel = 0;
#endif

	result = isc_mem_create(0, 0, &mctx);
	if (result != ISC_R_SUCCESS)
		return (result);
	result = isc_appctx_create(mctx, &actx);
	if (result != ISC_R_SUCCESS)
		goto cleanup;
	result = isc_app_ctxstart(actx);
	if (result != ISC_R_SUCCESS)
		goto cleanup;
	result = isc_taskmgr_createinctx(mctx, actx, 1, 0, &taskmgr);
	if (result != ISC_R_SUCCESS)
		goto cleanup;
	result = isc_socketmgr_createinctx(mctx, actx, &socketmgr);
	if (result != ISC_R_SUCCESS)
		goto cleanup;
	result = isc_timermgr_createinctx(mctx, actx, &timermgr);
	if (result != ISC_R_SUCCESS)
		goto cleanup;
#if 0
	result = isc_log_create(mctx, &lctx, &logconfig);
	if (result != ISC_R_SUCCESS)
		goto cleanup;
	isc_log_setcontext(lctx);
	dns_log_init(lctx);
	dns_log_setcontext(lctx);
	result = isc_log_usechannel(logconfig, "default_debug", NULL, NULL);
	if (result != ISC_R_SUCCESS)
		goto cleanup;
	isc_log_setdebuglevel(lctx, logdebuglevel);
#endif
	result = dns_client_createx(mctx, actx, taskmgr, socketmgr, timermgr,
				    options, clientp);
	if (result != ISC_R_SUCCESS)
		goto cleanup;

	(*clientp)->attributes |= DNS_CLIENTATTR_OWNCTX;

	/* client has its own reference to mctx, so we can detach it here */
	isc_mem_detach(&mctx);

	return (ISC_R_SUCCESS);

 cleanup:
	if (taskmgr != NULL)
		isc_taskmgr_destroy(&taskmgr);
	if (timermgr != NULL)
		isc_timermgr_destroy(&timermgr);
	if (socketmgr != NULL)
		isc_socketmgr_destroy(&socketmgr);
	if (actx != NULL)
		isc_appctx_destroy(&actx);
	isc_mem_detach(&mctx);

	return (result);
}

isc_result_t
dns_client_createx(isc_mem_t *mctx, isc_appctx_t *actx, isc_taskmgr_t *taskmgr,
		   isc_socketmgr_t *socketmgr, isc_timermgr_t *timermgr,
		   unsigned int options, dns_client_t **clientp)
{
	isc_result_t result;
	result = dns_client_createx2(mctx, actx, taskmgr, socketmgr, timermgr,
				     options, clientp, NULL, NULL);
	return (result);
}

isc_result_t
dns_client_createx2(isc_mem_t *mctx, isc_appctx_t *actx,
		    isc_taskmgr_t *taskmgr, isc_socketmgr_t *socketmgr,
		    isc_timermgr_t *timermgr, unsigned int options,
		    dns_client_t **clientp, isc_sockaddr_t *localaddr4,
		    isc_sockaddr_t *localaddr6)
{
	dns_client_t *client;
	isc_result_t result;
	dns_dispatchmgr_t *dispatchmgr = NULL;
	dns_dispatch_t *dispatchv4 = NULL;
	dns_dispatch_t *dispatchv6 = NULL;
	dns_view_t *view = NULL;

	REQUIRE(mctx != NULL);
	REQUIRE(taskmgr != NULL);
	REQUIRE(timermgr != NULL);
	REQUIRE(socketmgr != NULL);
	REQUIRE(clientp != NULL && *clientp == NULL);

	client = isc_mem_get(mctx, sizeof(*client));
	if (client == NULL)
		return (ISC_R_NOMEMORY);

	result = isc_mutex_init(&client->lock);
	if (result != ISC_R_SUCCESS) {
		isc_mem_put(mctx, client, sizeof(*client));
		return (result);
	}

	client->actx = actx;
	client->taskmgr = taskmgr;
	client->socketmgr = socketmgr;
	client->timermgr = timermgr;

	client->task = NULL;
	result = isc_task_create(client->taskmgr, 0, &client->task);
	if (result != ISC_R_SUCCESS)
		goto cleanup;

	result = dns_dispatchmgr_create(mctx, NULL, &dispatchmgr);
	if (result != ISC_R_SUCCESS)
		goto cleanup;
	client->dispatchmgr = dispatchmgr;

	/*
	 * If only one address family is specified, use it.
	 * If neither family is specified, or if both are, use both.
	 */
	client->dispatchv4 = NULL;
	if (localaddr4 != NULL || localaddr6 == NULL) {
	result = getudpdispatch(AF_INET, dispatchmgr, socketmgr,
					taskmgr, ISC_TRUE,
					&dispatchv4, localaddr4);
	if (result == ISC_R_SUCCESS)
		client->dispatchv4 = dispatchv4;
	}

	client->dispatchv6 = NULL;
	if (localaddr6 != NULL || localaddr4 == NULL) {
	result = getudpdispatch(AF_INET6, dispatchmgr, socketmgr,
					taskmgr, ISC_TRUE,
					&dispatchv6, localaddr6);
	if (result == ISC_R_SUCCESS)
		client->dispatchv6 = dispatchv6;
	}

	/* We need at least one of the dispatchers */
	if (dispatchv4 == NULL && dispatchv6 == NULL) {
		INSIST(result != ISC_R_SUCCESS);
		goto cleanup;
	}

	/* Create the default view for class IN */
	result = dns_client_createview(mctx, dns_rdataclass_in, options,
				       taskmgr, 31, socketmgr, timermgr,
				       dispatchmgr, dispatchv4, dispatchv6,
				       &view);
	if (result != ISC_R_SUCCESS)
		goto cleanup;
	ISC_LIST_INIT(client->viewlist);
	ISC_LIST_APPEND(client->viewlist, view, link);

	dns_view_freeze(view); /* too early? */

	ISC_LIST_INIT(client->resctxs);
	ISC_LIST_INIT(client->reqctxs);
	ISC_LIST_INIT(client->updatectxs);

	client->mctx = NULL;
	isc_mem_attach(mctx, &client->mctx);

	client->update_timeout = DEF_UPDATE_TIMEOUT;
	client->update_udptimeout = DEF_UPDATE_UDPTIMEOUT;
	client->update_udpretries = DEF_UPDATE_UDPRETRIES;
	client->find_timeout = DEF_FIND_TIMEOUT;
	client->find_udpretries = DEF_FIND_UDPRETRIES;
	client->attributes = 0;

	client->references = 1;
	client->magic = DNS_CLIENT_MAGIC;

	*clientp = client;

	return (ISC_R_SUCCESS);

 cleanup:
	if (dispatchv4 != NULL)
		dns_dispatch_detach(&dispatchv4);
	if (dispatchv6 != NULL)
		dns_dispatch_detach(&dispatchv6);
	if (dispatchmgr != NULL)
		dns_dispatchmgr_destroy(&dispatchmgr);
	if (client->task != NULL)
		isc_task_detach(&client->task);
	isc_mem_put(mctx, client, sizeof(*client));

	return (result);
}

static void
destroyclient(dns_client_t **clientp) {
	dns_client_t *client = *clientp;
	dns_view_t *view;

	while ((view = ISC_LIST_HEAD(client->viewlist)) != NULL) {
		ISC_LIST_UNLINK(client->viewlist, view, link);
		dns_view_detach(&view);
	}

	if (client->dispatchv4 != NULL)
		dns_dispatch_detach(&client->dispatchv4);
	if (client->dispatchv6 != NULL)
		dns_dispatch_detach(&client->dispatchv6);

	dns_dispatchmgr_destroy(&client->dispatchmgr);

	isc_task_detach(&client->task);

	/*
	 * If the client has created its own running environments,
	 * destroy them.
	 */
	if ((client->attributes & DNS_CLIENTATTR_OWNCTX) != 0) {
		isc_taskmgr_destroy(&client->taskmgr);
		isc_timermgr_destroy(&client->timermgr);
		isc_socketmgr_destroy(&client->socketmgr);

		isc_app_ctxfinish(client->actx);
		isc_appctx_destroy(&client->actx);
	}

	DESTROYLOCK(&client->lock);
	client->magic = 0;

	isc_mem_putanddetach(&client->mctx, client, sizeof(*client));

	*clientp = NULL;
}

void
dns_client_destroy(dns_client_t **clientp) {
	dns_client_t *client;
	isc_boolean_t destroyok = ISC_FALSE;

	REQUIRE(clientp != NULL);
	client = *clientp;
	REQUIRE(DNS_CLIENT_VALID(client));

	LOCK(&client->lock);
	client->references--;
	if (client->references == 0 && ISC_LIST_EMPTY(client->resctxs) &&
	    ISC_LIST_EMPTY(client->reqctxs) &&
	    ISC_LIST_EMPTY(client->updatectxs)) {
		destroyok = ISC_TRUE;
	}
	UNLOCK(&client->lock);

	if (destroyok)
		destroyclient(&client);

	*clientp = NULL;
}

isc_result_t
dns_client_setservers(dns_client_t *client, dns_rdataclass_t rdclass,
		      dns_name_t *namespace, isc_sockaddrlist_t *addrs)
{
	isc_result_t result;
	dns_view_t *view = NULL;

	REQUIRE(DNS_CLIENT_VALID(client));
	REQUIRE(addrs != NULL);

	if (namespace == NULL)
		namespace = dns_rootname;

	LOCK(&client->lock);
	result = dns_viewlist_find(&client->viewlist, DNS_CLIENTVIEW_NAME,
				   rdclass, &view);
	if (result != ISC_R_SUCCESS) {
		UNLOCK(&client->lock);
		return (result);
	}
	UNLOCK(&client->lock);

	result = dns_fwdtable_add(view->fwdtable, namespace, addrs,
				  dns_fwdpolicy_only);

	dns_view_detach(&view);

	return (result);
}

isc_result_t
dns_client_clearservers(dns_client_t *client, dns_rdataclass_t rdclass,
			dns_name_t *namespace)
{
	isc_result_t result;
	dns_view_t *view = NULL;

	REQUIRE(DNS_CLIENT_VALID(client));

	if (namespace == NULL)
		namespace = dns_rootname;

	LOCK(&client->lock);
	result = dns_viewlist_find(&client->viewlist, DNS_CLIENTVIEW_NAME,
				   rdclass, &view);
	if (result != ISC_R_SUCCESS) {
		UNLOCK(&client->lock);
		return (result);
	}
	UNLOCK(&client->lock);

	result = dns_fwdtable_delete(view->fwdtable, namespace);

	dns_view_detach(&view);

	return (result);
}

static isc_result_t
getrdataset(isc_mem_t *mctx, dns_rdataset_t **rdatasetp) {
	dns_rdataset_t *rdataset;

	REQUIRE(mctx != NULL);
	REQUIRE(rdatasetp != NULL && *rdatasetp == NULL);

	rdataset = isc_mem_get(mctx, sizeof(*rdataset));
	if (rdataset == NULL)
		return (ISC_R_NOMEMORY);

	dns_rdataset_init(rdataset);

	*rdatasetp = rdataset;

	return (ISC_R_SUCCESS);
}

static void
putrdataset(isc_mem_t *mctx, dns_rdataset_t **rdatasetp) {
	dns_rdataset_t *rdataset;

	REQUIRE(rdatasetp != NULL);
	rdataset = *rdatasetp;
	REQUIRE(rdataset != NULL);

	if (dns_rdataset_isassociated(rdataset))
		dns_rdataset_disassociate(rdataset);

	isc_mem_put(mctx, rdataset, sizeof(*rdataset));

	*rdatasetp = NULL;
}

static void
fetch_done(isc_task_t *task, isc_event_t *event) {
	resctx_t *rctx = event->ev_arg;
	dns_fetchevent_t *fevent;

	REQUIRE(event->ev_type == DNS_EVENT_FETCHDONE);
	REQUIRE(RCTX_VALID(rctx));
	REQUIRE(rctx->task == task);
	fevent = (dns_fetchevent_t *)event;

	client_resfind(rctx, fevent);
}

static inline isc_result_t
start_fetch(resctx_t *rctx) {
	isc_result_t result;

	/*
	 * The caller must be holding the rctx's lock.
	 */

	REQUIRE(rctx->fetch == NULL);

	result = dns_resolver_createfetch(rctx->view->resolver,
					  dns_fixedname_name(&rctx->name),
					  rctx->type,
					  NULL, NULL, NULL, 0,
					  rctx->task, fetch_done, rctx,
					  rctx->rdataset,
					  rctx->sigrdataset,
					  &rctx->fetch);

	return (result);
}

static isc_result_t
view_find(resctx_t *rctx, dns_db_t **dbp, dns_dbnode_t **nodep,
	  dns_name_t *foundname)
{
	isc_result_t result;
	dns_name_t *name = dns_fixedname_name(&rctx->name);
	dns_rdatatype_t type;

	if (rctx->type == dns_rdatatype_rrsig)
		type = dns_rdatatype_any;
	else
		type = rctx->type;

	result = dns_view_find(rctx->view, name, type, 0, 0, ISC_FALSE,
			       dbp, nodep, foundname, rctx->rdataset,
			       rctx->sigrdataset);

	return (result);
}

static void
client_resfind(resctx_t *rctx, dns_fetchevent_t *event) {
	isc_mem_t *mctx;
	isc_result_t tresult, result = ISC_R_SUCCESS;
	isc_result_t vresult = ISC_R_SUCCESS;
	isc_boolean_t want_restart;
	isc_boolean_t send_event = ISC_FALSE;
	dns_name_t *name, *prefix;
	dns_fixedname_t foundname, fixed;
	dns_rdataset_t *trdataset;
	dns_rdata_t rdata = DNS_RDATA_INIT;
	unsigned int nlabels;
	int order;
	dns_namereln_t namereln;
	dns_rdata_cname_t cname;
	dns_rdata_dname_t dname;

	REQUIRE(RCTX_VALID(rctx));

	LOCK(&rctx->lock);

	mctx = rctx->view->mctx;

	name = dns_fixedname_name(&rctx->name);

	do {
		dns_name_t *fname = NULL;
		dns_name_t *ansname = NULL;
		dns_db_t *db = NULL;
		dns_dbnode_t *node = NULL;

		rctx->restarts++;
		want_restart = ISC_FALSE;

		if (event == NULL && !rctx->canceled) {
			dns_fixedname_init(&foundname);
			fname = dns_fixedname_name(&foundname);
			INSIST(!dns_rdataset_isassociated(rctx->rdataset));
			INSIST(rctx->sigrdataset == NULL ||
			       !dns_rdataset_isassociated(rctx->sigrdataset));
			result = view_find(rctx, &db, &node, fname);
			if (result == ISC_R_NOTFOUND) {
				/*
				 * We don't know anything about the name.
				 * Launch a fetch.
				 */
				if (node != NULL) {
					INSIST(db != NULL);
					dns_db_detachnode(db, &node);
				}
				if (db != NULL)
					dns_db_detach(&db);
				result = start_fetch(rctx);
				if (result != ISC_R_SUCCESS) {
					putrdataset(mctx, &rctx->rdataset);
					if (rctx->sigrdataset != NULL)
						putrdataset(mctx,
							    &rctx->sigrdataset);
					send_event = ISC_TRUE;
				}
				goto done;
			}
		} else {
			INSIST(event != NULL);
			INSIST(event->fetch == rctx->fetch);
			dns_resolver_destroyfetch(&rctx->fetch);
			db = event->db;
			node = event->node;
			result = event->result;
			vresult = event->vresult;
			fname = dns_fixedname_name(&event->foundname);
			INSIST(event->rdataset == rctx->rdataset);
			INSIST(event->sigrdataset == rctx->sigrdataset);
		}

		/*
		 * If we've been canceled, forget about the result.
		 */
		if (rctx->canceled)
			result = ISC_R_CANCELED;
		else {
			/*
			 * Otherwise, get some resource for copying the
			 * result.
			 */
			ansname = isc_mem_get(mctx, sizeof(*ansname));
			if (ansname == NULL)
				tresult = ISC_R_NOMEMORY;
			else {
				dns_name_t *aname;

				aname = dns_fixedname_name(&rctx->name);
				dns_name_init(ansname, NULL);
				tresult = dns_name_dup(aname, mctx, ansname);
				if (tresult != ISC_R_SUCCESS)
					isc_mem_put(mctx, ansname,
						    sizeof(*ansname));
			}
			if (tresult != ISC_R_SUCCESS)
				result = tresult;
		}

		switch (result) {
		case ISC_R_SUCCESS:
			send_event = ISC_TRUE;
			/*
			 * This case is handled in the main line below.
			 */
			break;
		case DNS_R_CNAME:
			/*
			 * Add the CNAME to the answer list.
			 */
			trdataset = rctx->rdataset;
			ISC_LIST_APPEND(ansname->list, rctx->rdataset, link);
			rctx->rdataset = NULL;
			if (rctx->sigrdataset != NULL) {
				ISC_LIST_APPEND(ansname->list,
						rctx->sigrdataset, link);
				rctx->sigrdataset = NULL;
			}
			ISC_LIST_APPEND(rctx->namelist, ansname, link);
			ansname = NULL;

			/*
			 * Copy the CNAME's target into the lookup's
			 * query name and start over.
			 */
			tresult = dns_rdataset_first(trdataset);
			if (tresult != ISC_R_SUCCESS)
				goto done;
			dns_rdataset_current(trdataset, &rdata);
			tresult = dns_rdata_tostruct(&rdata, &cname, NULL);
			dns_rdata_reset(&rdata);
			if (tresult != ISC_R_SUCCESS)
				goto done;
			tresult = dns_name_copy(&cname.cname, name, NULL);
			dns_rdata_freestruct(&cname);
			if (tresult == ISC_R_SUCCESS)
				want_restart = ISC_TRUE;
			else
				result = tresult;
			goto done;
		case DNS_R_DNAME:
			/*
			 * Add the DNAME to the answer list.
			 */
			trdataset = rctx->rdataset;
			ISC_LIST_APPEND(ansname->list, rctx->rdataset, link);
			rctx->rdataset = NULL;
			if (rctx->sigrdataset != NULL) {
				ISC_LIST_APPEND(ansname->list,
						rctx->sigrdataset, link);
				rctx->sigrdataset = NULL;
			}
			ISC_LIST_APPEND(rctx->namelist, ansname, link);
			ansname = NULL;

			namereln = dns_name_fullcompare(name, fname, &order,
							&nlabels);
			INSIST(namereln == dns_namereln_subdomain);
			/*
			 * Get the target name of the DNAME.
			 */
			tresult = dns_rdataset_first(trdataset);
			if (tresult != ISC_R_SUCCESS) {
				result = tresult;
				goto done;
			}
			dns_rdataset_current(trdataset, &rdata);
			tresult = dns_rdata_tostruct(&rdata, &dname, NULL);
			dns_rdata_reset(&rdata);
			if (tresult != ISC_R_SUCCESS) {
				result = tresult;
				goto done;
			}
			/*
			 * Construct the new query name and start over.
			 */
			dns_fixedname_init(&fixed);
			prefix = dns_fixedname_name(&fixed);
			dns_name_split(name, nlabels, prefix, NULL);
			tresult = dns_name_concatenate(prefix, &dname.dname,
						      name, NULL);
			dns_rdata_freestruct(&dname);
			if (tresult == ISC_R_SUCCESS)
				want_restart = ISC_TRUE;
			else
				result = tresult;
			goto done;
		case DNS_R_NCACHENXDOMAIN:
		case DNS_R_NCACHENXRRSET:
			ISC_LIST_APPEND(ansname->list, rctx->rdataset, link);
			ISC_LIST_APPEND(rctx->namelist, ansname, link);
			ansname = NULL;
			rctx->rdataset = NULL;
			/* What about sigrdataset? */
			if (rctx->sigrdataset != NULL)
				putrdataset(mctx, &rctx->sigrdataset);
			send_event = ISC_TRUE;
			goto done;
		default:
			if (rctx->rdataset != NULL)
				putrdataset(mctx, &rctx->rdataset);
			if (rctx->sigrdataset != NULL)
				putrdataset(mctx, &rctx->sigrdataset);
			send_event = ISC_TRUE;
			goto done;
		}

		if (rctx->type == dns_rdatatype_any) {
			int n = 0;
			dns_rdatasetiter_t *rdsiter = NULL;

			tresult = dns_db_allrdatasets(db, node, NULL, 0,
						      &rdsiter);
			if (tresult != ISC_R_SUCCESS) {
				result = tresult;
				goto done;
			}

			tresult = dns_rdatasetiter_first(rdsiter);
			while (tresult == ISC_R_SUCCESS) {
				dns_rdatasetiter_current(rdsiter,
							 rctx->rdataset);
				if (rctx->rdataset->type != 0) {
					ISC_LIST_APPEND(ansname->list,
							rctx->rdataset,
							link);
					n++;
					rctx->rdataset = NULL;
				} else {
					/*
					 * We're not interested in this
					 * rdataset.
					 */
					dns_rdataset_disassociate(
						rctx->rdataset);
				}
				tresult = dns_rdatasetiter_next(rdsiter);

				if (tresult == ISC_R_SUCCESS &&
				    rctx->rdataset == NULL) {
					tresult = getrdataset(mctx,
							      &rctx->rdataset);
					if (tresult != ISC_R_SUCCESS) {
						result = tresult;
						POST(result);
						break;
					}
				}
			}
			if (n == 0) {
				/*
				 * We didn't match any rdatasets (which means
				 * something went wrong in this
				 * implementation).
				 */
				result = DNS_R_SERVFAIL; /* better code? */
				POST(result);
			} else {
				ISC_LIST_APPEND(rctx->namelist, ansname, link);
				ansname = NULL;
			}
			dns_rdatasetiter_destroy(&rdsiter);
			if (tresult != ISC_R_NOMORE)
				result = DNS_R_SERVFAIL; /* ditto */
			else
				result = ISC_R_SUCCESS;
			goto done;
		} else {
			/*
			 * This is the "normal" case -- an ordinary question
			 * to which we've got the answer.
			 */
			ISC_LIST_APPEND(ansname->list, rctx->rdataset, link);
			rctx->rdataset = NULL;
			if (rctx->sigrdataset != NULL) {
				ISC_LIST_APPEND(ansname->list,
						rctx->sigrdataset, link);
				rctx->sigrdataset = NULL;
			}
			ISC_LIST_APPEND(rctx->namelist, ansname, link);
			ansname = NULL;
		}

	done:
		/*
		 * Free temporary resources
		 */
		if (ansname != NULL) {
			dns_rdataset_t *rdataset;

			while ((rdataset = ISC_LIST_HEAD(ansname->list))
			       != NULL) {
				ISC_LIST_UNLINK(ansname->list, rdataset, link);
				putrdataset(mctx, &rdataset);
			}
			dns_name_free(ansname, mctx);
			isc_mem_put(mctx, ansname, sizeof(*ansname));
		}

		if (node != NULL)
			dns_db_detachnode(db, &node);
		if (db != NULL)
			dns_db_detach(&db);
		if (event != NULL)
			isc_event_free(ISC_EVENT_PTR(&event));

		/*
		 * Limit the number of restarts.
		 */
		if (want_restart && rctx->restarts == MAX_RESTARTS) {
			want_restart = ISC_FALSE;
			result = ISC_R_QUOTA;
			send_event = ISC_TRUE;
		}

		/*
		 * Prepare further find with new resources
		 */
		if (want_restart) {
			INSIST(rctx->rdataset == NULL &&
			       rctx->sigrdataset == NULL);

			result = getrdataset(mctx, &rctx->rdataset);
			if (result == ISC_R_SUCCESS && rctx->want_dnssec) {
				result = getrdataset(mctx, &rctx->sigrdataset);
				if (result != ISC_R_SUCCESS) {
					putrdataset(mctx, &rctx->rdataset);
				}
			}

			if (result != ISC_R_SUCCESS) {
				want_restart = ISC_FALSE;
				send_event = ISC_TRUE;
			}
		}
	} while (want_restart);

	if (send_event) {
		isc_task_t *task;

		while ((name = ISC_LIST_HEAD(rctx->namelist)) != NULL) {
			ISC_LIST_UNLINK(rctx->namelist, name, link);
			ISC_LIST_APPEND(rctx->event->answerlist, name, link);
		}

		rctx->event->result = result;
		rctx->event->vresult = vresult;
		task = rctx->event->ev_sender;
		rctx->event->ev_sender = rctx;
		isc_task_sendanddetach(&task, ISC_EVENT_PTR(&rctx->event));
	}

	UNLOCK(&rctx->lock);
}


static void
suspend(isc_task_t *task, isc_event_t *event) {
	isc_appctx_t *actx = event->ev_arg;

	UNUSED(task);

	isc_app_ctxsuspend(actx);
	isc_event_free(&event);
}

static void
resolve_done(isc_task_t *task, isc_event_t *event) {
	resarg_t *resarg = event->ev_arg;
	dns_clientresevent_t *rev = (dns_clientresevent_t *)event;
	dns_name_t *name;
	isc_result_t result;

	UNUSED(task);

	LOCK(&resarg->lock);

	resarg->result = rev->result;
	resarg->vresult = rev->vresult;
	while ((name = ISC_LIST_HEAD(rev->answerlist)) != NULL) {
		ISC_LIST_UNLINK(rev->answerlist, name, link);
		ISC_LIST_APPEND(*resarg->namelist, name, link);
	}

	dns_client_destroyrestrans(&resarg->trans);
	isc_event_free(&event);

	if (!resarg->canceled) {
		UNLOCK(&resarg->lock);

		/*
		 * We may or may not be running.  isc__appctx_onrun will
		 * fail if we are currently running otherwise we post a
		 * action to call isc_app_ctxsuspend when we do start
		 * running.
		 */
		result = isc_app_ctxonrun(resarg->actx, resarg->client->mctx,
					   task, suspend, resarg->actx);
		if (result == ISC_R_ALREADYRUNNING)
		isc_app_ctxsuspend(resarg->actx);
	} else {
		/*
		 * We have already exited from the loop (due to some
		 * unexpected event).  Just clean the arg up.
		 */
		UNLOCK(&resarg->lock);
		DESTROYLOCK(&resarg->lock);
		isc_mem_put(resarg->client->mctx, resarg, sizeof(*resarg));
	}
}

isc_result_t
dns_client_resolve(dns_client_t *client, dns_name_t *name,
		   dns_rdataclass_t rdclass, dns_rdatatype_t type,
		   unsigned int options, dns_namelist_t *namelist)
{
	isc_result_t result;
	isc_appctx_t *actx;
	resarg_t *resarg;

	REQUIRE(DNS_CLIENT_VALID(client));
	REQUIRE(namelist != NULL && ISC_LIST_EMPTY(*namelist));

	if ((client->attributes & DNS_CLIENTATTR_OWNCTX) == 0 &&
	    (options & DNS_CLIENTRESOPT_ALLOWRUN) == 0) {
		/*
		 * If the client is run under application's control, we need
		 * to create a new running (sub)environment for this
		 * particular resolution.
		 */
		return (ISC_R_NOTIMPLEMENTED); /* XXXTBD */
	} else
		actx = client->actx;

	resarg = isc_mem_get(client->mctx, sizeof(*resarg));
	if (resarg == NULL)
		return (ISC_R_NOMEMORY);

	result = isc_mutex_init(&resarg->lock);
	if (result != ISC_R_SUCCESS) {
		isc_mem_put(client->mctx, resarg, sizeof(*resarg));
		return (result);
	}

	resarg->actx = actx;
	resarg->client = client;
	resarg->result = DNS_R_SERVFAIL;
	resarg->namelist = namelist;
	resarg->trans = NULL;
	resarg->canceled = ISC_FALSE;
	result = dns_client_startresolve(client, name, rdclass, type, options,
					 client->task, resolve_done, resarg,
					 &resarg->trans);
	if (result != ISC_R_SUCCESS) {
		DESTROYLOCK(&resarg->lock);
		isc_mem_put(client->mctx, resarg, sizeof(*resarg));
		return (result);
	}

	/*
	 * Start internal event loop.  It blocks until the entire process
	 * is completed.
	 */
	result = isc_app_ctxrun(actx);

	LOCK(&resarg->lock);
	if (result == ISC_R_SUCCESS || result == ISC_R_SUSPEND)
		result = resarg->result;
	if (result != ISC_R_SUCCESS && resarg->vresult != ISC_R_SUCCESS) {
		/*
		 * If this lookup failed due to some error in DNSSEC
		 * validation, return the validation error code.
		 * XXX: or should we pass the validation result separately?
		 */
		result = resarg->vresult;
	}
	if (resarg->trans != NULL) {
		/*
		 * Unusual termination (perhaps due to signal).  We need some
		 * tricky cleanup process.
		 */
		resarg->canceled = ISC_TRUE;
		dns_client_cancelresolve(resarg->trans);

		UNLOCK(&resarg->lock);

		/* resarg will be freed in the event handler. */
	} else {
		UNLOCK(&resarg->lock);

		DESTROYLOCK(&resarg->lock);
		isc_mem_put(client->mctx, resarg, sizeof(*resarg));
	}

	return (result);
}

isc_result_t
dns_client_startresolve(dns_client_t *client, dns_name_t *name,
			dns_rdataclass_t rdclass, dns_rdatatype_t type,
			unsigned int options, isc_task_t *task,
			isc_taskaction_t action, void *arg,
			dns_clientrestrans_t **transp)
{
	dns_view_t *view = NULL;
	dns_clientresevent_t *event = NULL;
	resctx_t *rctx = NULL;
	isc_task_t *clone = NULL;
	isc_mem_t *mctx;
	isc_result_t result;
	dns_rdataset_t *rdataset, *sigrdataset;
	isc_boolean_t want_dnssec;

	REQUIRE(DNS_CLIENT_VALID(client));
	REQUIRE(transp != NULL && *transp == NULL);

	LOCK(&client->lock);
	result = dns_viewlist_find(&client->viewlist, DNS_CLIENTVIEW_NAME,
				   rdclass, &view);
	UNLOCK(&client->lock);
	if (result != ISC_R_SUCCESS)
		return (result);

	mctx = client->mctx;
	rdataset = NULL;
	sigrdataset = NULL;
	want_dnssec = ISC_TF((options & DNS_CLIENTRESOPT_NODNSSEC) == 0);

	/*
	 * Prepare some intermediate resources
	 */
	clone = NULL;
	isc_task_attach(task, &clone);
	event = (dns_clientresevent_t *)
		isc_event_allocate(mctx, clone, DNS_EVENT_CLIENTRESDONE,
				   action, arg, sizeof(*event));
	if (event == NULL) {
		result = ISC_R_NOMEMORY;
		goto cleanup;
	}
	event->result = DNS_R_SERVFAIL;
	ISC_LIST_INIT(event->answerlist);

	rctx = isc_mem_get(mctx, sizeof(*rctx));
	if (rctx == NULL)
		result = ISC_R_NOMEMORY;
	else {
		result = isc_mutex_init(&rctx->lock);
		if (result != ISC_R_SUCCESS) {
			isc_mem_put(mctx, rctx, sizeof(*rctx));
			rctx = NULL;
		}
	}
	if (result != ISC_R_SUCCESS)
		goto cleanup;

	result = getrdataset(mctx, &rdataset);
	if (result != ISC_R_SUCCESS)
		goto cleanup;
	rctx->rdataset = rdataset;

	if (want_dnssec) {
		result = getrdataset(mctx, &sigrdataset);
		if (result != ISC_R_SUCCESS)
			goto cleanup;
	}
	rctx->sigrdataset = sigrdataset;

	dns_fixedname_init(&rctx->name);
	result = dns_name_copy(name, dns_fixedname_name(&rctx->name), NULL);
	if (result != ISC_R_SUCCESS)
		goto cleanup;

	rctx->client = client;
	ISC_LINK_INIT(rctx, link);
	rctx->canceled = ISC_FALSE;
	rctx->task = client->task;
	rctx->type = type;
	rctx->view = view;
	rctx->restarts = 0;
	rctx->fetch = NULL;
	rctx->want_dnssec = want_dnssec;
	ISC_LIST_INIT(rctx->namelist);
	rctx->event = event;

	rctx->magic = RCTX_MAGIC;

	LOCK(&client->lock);
	ISC_LIST_APPEND(client->resctxs, rctx, link);
	UNLOCK(&client->lock);

	*transp = (dns_clientrestrans_t *)rctx;
	client_resfind(rctx, NULL);

	return (ISC_R_SUCCESS);

 cleanup:
	if (rdataset != NULL)
		putrdataset(client->mctx, &rdataset);
	if (sigrdataset != NULL)
		putrdataset(client->mctx, &sigrdataset);
	if (rctx != NULL) {
		DESTROYLOCK(&rctx->lock);
		isc_mem_put(mctx, rctx, sizeof(*rctx));
	}
	if (event != NULL)
		isc_event_free(ISC_EVENT_PTR(&event));
	isc_task_detach(&clone);
	dns_view_detach(&view);

	return (result);
}

void
dns_client_cancelresolve(dns_clientrestrans_t *trans) {
	resctx_t *rctx;

	REQUIRE(trans != NULL);
	rctx = (resctx_t *)trans;
	REQUIRE(RCTX_VALID(rctx));

	LOCK(&rctx->lock);

	if (!rctx->canceled) {
		rctx->canceled = ISC_TRUE;
		if (rctx->fetch != NULL)
			dns_resolver_cancelfetch(rctx->fetch);
	}

	UNLOCK(&rctx->lock);
}

void
dns_client_freeresanswer(dns_client_t *client, dns_namelist_t *namelist) {
	dns_name_t *name;
	dns_rdataset_t *rdataset;

	REQUIRE(DNS_CLIENT_VALID(client));
	REQUIRE(namelist != NULL);

	while ((name = ISC_LIST_HEAD(*namelist)) != NULL) {
		ISC_LIST_UNLINK(*namelist, name, link);
		while ((rdataset = ISC_LIST_HEAD(name->list)) != NULL) {
			ISC_LIST_UNLINK(name->list, rdataset, link);
			putrdataset(client->mctx, &rdataset);
		}
		dns_name_free(name, client->mctx);
		isc_mem_put(client->mctx, name, sizeof(*name));
	}
}

void
dns_client_destroyrestrans(dns_clientrestrans_t **transp) {
	resctx_t *rctx;
	isc_mem_t *mctx;
	dns_client_t *client;
	isc_boolean_t need_destroyclient = ISC_FALSE;

	REQUIRE(transp != NULL);
	rctx = (resctx_t *)*transp;
	REQUIRE(RCTX_VALID(rctx));
	REQUIRE(rctx->fetch == NULL);
	REQUIRE(rctx->event == NULL);
	client = rctx->client;
	REQUIRE(DNS_CLIENT_VALID(client));

	mctx = client->mctx;
	dns_view_detach(&rctx->view);

	LOCK(&client->lock);

	INSIST(ISC_LINK_LINKED(rctx, link));
	ISC_LIST_UNLINK(client->resctxs, rctx, link);

	if (client->references == 0 && ISC_LIST_EMPTY(client->resctxs) &&
	    ISC_LIST_EMPTY(client->reqctxs) &&
	    ISC_LIST_EMPTY(client->updatectxs))
		need_destroyclient = ISC_TRUE;

	UNLOCK(&client->lock);

	INSIST(ISC_LIST_EMPTY(rctx->namelist));

	DESTROYLOCK(&rctx->lock);
	rctx->magic = 0;

	isc_mem_put(mctx, rctx, sizeof(*rctx));

	if (need_destroyclient)
		destroyclient(&client);

	*transp = NULL;
}

isc_result_t
dns_client_addtrustedkey(dns_client_t *client, dns_rdataclass_t rdclass,
			 dns_name_t *keyname, isc_buffer_t *keydatabuf)
{
	isc_result_t result;
	dns_view_t *view = NULL;
	dst_key_t *dstkey = NULL;
	dns_keytable_t *secroots = NULL;

	REQUIRE(DNS_CLIENT_VALID(client));

	LOCK(&client->lock);
	result = dns_viewlist_find(&client->viewlist, DNS_CLIENTVIEW_NAME,
				   rdclass, &view);
	UNLOCK(&client->lock);
	if (result != ISC_R_SUCCESS)
		goto cleanup;

	result = dns_view_getsecroots(view, &secroots);
	if (result != ISC_R_SUCCESS)
		goto cleanup;

	result = dst_key_fromdns(keyname, rdclass, keydatabuf, client->mctx,
				 &dstkey);
	if (result != ISC_R_SUCCESS)
		goto cleanup;

	result = dns_keytable_add(secroots, ISC_FALSE, &dstkey);

 cleanup:
	if (dstkey != NULL)
		dst_key_free(&dstkey);
	if (view != NULL)
		dns_view_detach(&view);
	if (secroots != NULL)
		dns_keytable_detach(&secroots);
	return (result);
}

/*%
 * Simple request routines
 */
static void
request_done(isc_task_t *task, isc_event_t *event) {
	dns_requestevent_t *reqev = NULL;
	dns_request_t *request;
	isc_result_t result, eresult;
	reqctx_t *ctx;

	UNUSED(task);

	REQUIRE(event->ev_type == DNS_EVENT_REQUESTDONE);
	reqev = (dns_requestevent_t *)event;
	request = reqev->request;
	result = eresult = reqev->result;
	ctx = reqev->ev_arg;
	REQUIRE(REQCTX_VALID(ctx));

	isc_event_free(&event);

	LOCK(&ctx->lock);

	if (eresult == ISC_R_SUCCESS) {
		result = dns_request_getresponse(request, ctx->event->rmessage,
						 ctx->parseoptions);
	}

	if (ctx->tsigkey != NULL)
		dns_tsigkey_detach(&ctx->tsigkey);

	if (ctx->canceled)
		ctx->event->result = ISC_R_CANCELED;
	else
		ctx->event->result = result;
	task = ctx->event->ev_sender;
	ctx->event->ev_sender = ctx;
	isc_task_sendanddetach(&task, ISC_EVENT_PTR(&ctx->event));

	UNLOCK(&ctx->lock);
}

static void
localrequest_done(isc_task_t *task, isc_event_t *event) {
	reqarg_t *reqarg = event->ev_arg;
	dns_clientreqevent_t *rev =(dns_clientreqevent_t *)event;

	UNUSED(task);

	REQUIRE(event->ev_type == DNS_EVENT_CLIENTREQDONE);

	LOCK(&reqarg->lock);

	reqarg->result = rev->result;
	dns_client_destroyreqtrans(&reqarg->trans);
	isc_event_free(&event);

	if (!reqarg->canceled) {
		UNLOCK(&reqarg->lock);

		/* Exit from the internal event loop */
		isc_app_ctxsuspend(reqarg->actx);
	} else {
		/*
		 * We have already exited from the loop (due to some
		 * unexpected event).  Just clean the arg up.
		 */
		UNLOCK(&reqarg->lock);
		DESTROYLOCK(&reqarg->lock);
		isc_mem_put(reqarg->client->mctx, reqarg, sizeof(*reqarg));
	}
}

isc_result_t
dns_client_request(dns_client_t *client, dns_message_t *qmessage,
		   dns_message_t *rmessage, isc_sockaddr_t *server,
		   unsigned int options, unsigned int parseoptions,
		   dns_tsec_t *tsec, unsigned int timeout,
		   unsigned int udptimeout, unsigned int udpretries)
{
	isc_appctx_t *actx;
	reqarg_t *reqarg;
	isc_result_t result;

	REQUIRE(DNS_CLIENT_VALID(client));
	REQUIRE(qmessage != NULL);
	REQUIRE(rmessage != NULL);

	if ((client->attributes & DNS_CLIENTATTR_OWNCTX) == 0 &&
	    (options & DNS_CLIENTREQOPT_ALLOWRUN) == 0) {
		/*
		 * If the client is run under application's control, we need
		 * to create a new running (sub)environment for this
		 * particular resolution.
		 */
		return (ISC_R_NOTIMPLEMENTED); /* XXXTBD */
	} else
		actx = client->actx;

	reqarg = isc_mem_get(client->mctx, sizeof(*reqarg));
	if (reqarg == NULL)
		return (ISC_R_NOMEMORY);

	result = isc_mutex_init(&reqarg->lock);
	if (result != ISC_R_SUCCESS) {
		isc_mem_put(client->mctx, reqarg, sizeof(*reqarg));
		return (result);
	}

	reqarg->actx = actx;
	reqarg->client = client;
	reqarg->trans = NULL;
	reqarg->canceled = ISC_FALSE;

	result = dns_client_startrequest(client, qmessage, rmessage, server,
					 options, parseoptions, tsec, timeout,
					 udptimeout, udpretries,
					 client->task, localrequest_done,
					 reqarg, &reqarg->trans);
	if (result != ISC_R_SUCCESS) {
		DESTROYLOCK(&reqarg->lock);
		isc_mem_put(client->mctx, reqarg, sizeof(*reqarg));
		return (result);
	}

	/*
	 * Start internal event loop.  It blocks until the entire process
	 * is completed.
	 */
	result = isc_app_ctxrun(actx);

	LOCK(&reqarg->lock);
	if (result == ISC_R_SUCCESS || result == ISC_R_SUSPEND)
		result = reqarg->result;
	if (reqarg->trans != NULL) {
		/*
		 * Unusual termination (perhaps due to signal).  We need some
		 * tricky cleanup process.
		 */
		reqarg->canceled = ISC_TRUE;
		dns_client_cancelresolve(reqarg->trans);

		UNLOCK(&reqarg->lock);

		/* reqarg will be freed in the event handler. */
	} else {
		UNLOCK(&reqarg->lock);

		DESTROYLOCK(&reqarg->lock);
		isc_mem_put(client->mctx, reqarg, sizeof(*reqarg));
	}

	return (result);
}

isc_result_t
dns_client_startrequest(dns_client_t *client, dns_message_t *qmessage,
			dns_message_t *rmessage, isc_sockaddr_t *server,
			unsigned int options, unsigned int parseoptions,
			dns_tsec_t *tsec, unsigned int timeout,
			unsigned int udptimeout, unsigned int udpretries,
			isc_task_t *task, isc_taskaction_t action, void *arg,
			dns_clientreqtrans_t **transp)
{
	isc_result_t result;
	dns_view_t *view = NULL;
	isc_task_t *clone = NULL;
	dns_clientreqevent_t *event = NULL;
	reqctx_t *ctx = NULL;
	dns_tsectype_t tsectype = dns_tsectype_none;

	UNUSED(options);

	REQUIRE(DNS_CLIENT_VALID(client));
	REQUIRE(qmessage != NULL);
	REQUIRE(rmessage != NULL);
	REQUIRE(transp != NULL && *transp == NULL);

	if (tsec != NULL) {
		tsectype = dns_tsec_gettype(tsec);
		if (tsectype != dns_tsectype_tsig)
			return (ISC_R_NOTIMPLEMENTED); /* XXX */
	}

	LOCK(&client->lock);
	result = dns_viewlist_find(&client->viewlist, DNS_CLIENTVIEW_NAME,
				   qmessage->rdclass, &view);
	UNLOCK(&client->lock);
	if (result != ISC_R_SUCCESS)
		return (result);

	clone = NULL;
	isc_task_attach(task, &clone);
	event = (dns_clientreqevent_t *)
		isc_event_allocate(client->mctx, clone,
				   DNS_EVENT_CLIENTREQDONE,
				   action, arg, sizeof(*event));
	if (event == NULL) {
		result = ISC_R_NOMEMORY;
		goto cleanup;
	}

	ctx = isc_mem_get(client->mctx, sizeof(*ctx));
	if (ctx == NULL)
		result = ISC_R_NOMEMORY;
	else {
		result = isc_mutex_init(&ctx->lock);
		if (result != ISC_R_SUCCESS) {
			isc_mem_put(client->mctx, ctx, sizeof(*ctx));
			ctx = NULL;
		}
	}
	if (result != ISC_R_SUCCESS)
		goto cleanup;

	ctx->client = client;
	ISC_LINK_INIT(ctx, link);
	ctx->parseoptions = parseoptions;
	ctx->canceled = ISC_FALSE;
	ctx->event = event;
	ctx->event->rmessage = rmessage;
	ctx->tsigkey = NULL;
	if (tsec != NULL)
		dns_tsec_getkey(tsec, &ctx->tsigkey);

	ctx->magic = REQCTX_MAGIC;

	LOCK(&client->lock);
	ISC_LIST_APPEND(client->reqctxs, ctx, link);
	UNLOCK(&client->lock);

	ctx->request = NULL;
	result = dns_request_createvia3(view->requestmgr, qmessage, NULL,
					server, options, ctx->tsigkey,
					timeout, udptimeout, udpretries,
					client->task, request_done, ctx,
					&ctx->request);
	if (result == ISC_R_SUCCESS) {
		dns_view_detach(&view);
		*transp = (dns_clientreqtrans_t *)ctx;
		return (ISC_R_SUCCESS);
	}

 cleanup:
	if (ctx != NULL) {
		LOCK(&client->lock);
		ISC_LIST_UNLINK(client->reqctxs, ctx, link);
		UNLOCK(&client->lock);
		DESTROYLOCK(&ctx->lock);
		isc_mem_put(client->mctx, ctx, sizeof(*ctx));
	}
	if (event != NULL)
		isc_event_free(ISC_EVENT_PTR(&event));
	isc_task_detach(&clone);
	dns_view_detach(&view);

	return (result);
}

void
dns_client_cancelrequest(dns_clientreqtrans_t *trans) {
	reqctx_t *ctx;

	REQUIRE(trans != NULL);
	ctx = (reqctx_t *)trans;
	REQUIRE(REQCTX_VALID(ctx));

	LOCK(&ctx->lock);

	if (!ctx->canceled) {
		ctx->canceled = ISC_TRUE;
		if (ctx->request != NULL)
			dns_request_cancel(ctx->request);
	}

	UNLOCK(&ctx->lock);
}

void
dns_client_destroyreqtrans(dns_clientreqtrans_t **transp) {
	reqctx_t *ctx;
	isc_mem_t *mctx;
	dns_client_t *client;
	isc_boolean_t need_destroyclient = ISC_FALSE;

	REQUIRE(transp != NULL);
	ctx = (reqctx_t *)*transp;
	REQUIRE(REQCTX_VALID(ctx));
	client = ctx->client;
	REQUIRE(DNS_CLIENT_VALID(client));
	REQUIRE(ctx->event == NULL);
	REQUIRE(ctx->request != NULL);

	dns_request_destroy(&ctx->request);
	mctx = client->mctx;

	LOCK(&client->lock);

	INSIST(ISC_LINK_LINKED(ctx, link));
	ISC_LIST_UNLINK(client->reqctxs, ctx, link);

	if (client->references == 0 && ISC_LIST_EMPTY(client->resctxs) &&
	    ISC_LIST_EMPTY(client->reqctxs) &&
	    ISC_LIST_EMPTY(client->updatectxs)) {
		need_destroyclient = ISC_TRUE;
	}

	UNLOCK(&client->lock);

	DESTROYLOCK(&ctx->lock);
	ctx->magic = 0;

	isc_mem_put(mctx, ctx, sizeof(*ctx));

	if (need_destroyclient)
		destroyclient(&client);

	*transp = NULL;
}

/*%
 * Dynamic update routines
 */
static isc_result_t
rcode2result(dns_rcode_t rcode) {
	/* XXX: isn't there a similar function? */
	switch (rcode) {
	case dns_rcode_formerr:
		return (DNS_R_FORMERR);
	case dns_rcode_servfail:
		return (DNS_R_SERVFAIL);
	case dns_rcode_nxdomain:
		return (DNS_R_NXDOMAIN);
	case dns_rcode_notimp:
		return (DNS_R_NOTIMP);
	case dns_rcode_refused:
		return (DNS_R_REFUSED);
	case dns_rcode_yxdomain:
		return (DNS_R_YXDOMAIN);
	case dns_rcode_yxrrset:
		return (DNS_R_YXRRSET);
	case dns_rcode_nxrrset:
		return (DNS_R_NXRRSET);
	case dns_rcode_notauth:
		return (DNS_R_NOTAUTH);
	case dns_rcode_notzone:
		return (DNS_R_NOTZONE);
	case dns_rcode_badvers:
		return (DNS_R_BADVERS);
	}

	return (ISC_R_FAILURE);
}

static void
update_sendevent(updatectx_t *uctx, isc_result_t result) {
	isc_task_t *task;

	dns_message_destroy(&uctx->updatemsg);
	if (uctx->tsigkey != NULL)
		dns_tsigkey_detach(&uctx->tsigkey);
	if (uctx->sig0key != NULL)
		dst_key_free(&uctx->sig0key);

	if (uctx->canceled)
		uctx->event->result = ISC_R_CANCELED;
	else
		uctx->event->result = result;
	uctx->event->state = uctx->state;
	task = uctx->event->ev_sender;
	uctx->event->ev_sender = uctx;
	isc_task_sendanddetach(&task, ISC_EVENT_PTR(&uctx->event));
}

static void
update_done(isc_task_t *task, isc_event_t *event) {
	isc_result_t result;
	dns_requestevent_t *reqev = NULL;
	dns_request_t *request;
	dns_message_t *answer = NULL;
	updatectx_t *uctx = event->ev_arg;
	dns_client_t *client;
	unsigned int timeout;

	UNUSED(task);

	REQUIRE(event->ev_type == DNS_EVENT_REQUESTDONE);
	reqev = (dns_requestevent_t *)event;
	request = reqev->request;
	REQUIRE(UCTX_VALID(uctx));
	client = uctx->client;
	REQUIRE(DNS_CLIENT_VALID(client));

	result = reqev->result;
	if (result != ISC_R_SUCCESS)
		goto out;

	result = dns_message_create(client->mctx, DNS_MESSAGE_INTENTPARSE,
				    &answer);
	if (result != ISC_R_SUCCESS)
		goto out;
	uctx->state = dns_clientupdatestate_done;
	result = dns_request_getresponse(request, answer,
					 DNS_MESSAGEPARSE_PRESERVEORDER);
	if (result == ISC_R_SUCCESS && answer->rcode != dns_rcode_noerror)
		result = rcode2result(answer->rcode);

 out:
	if (answer != NULL)
		dns_message_destroy(&answer);
	isc_event_free(&event);

	LOCK(&uctx->lock);
	uctx->currentserver = ISC_LIST_NEXT(uctx->currentserver, link);
	dns_request_destroy(&uctx->updatereq);
	if (result != ISC_R_SUCCESS && !uctx->canceled &&
	    uctx->currentserver != NULL) {
		dns_message_renderreset(uctx->updatemsg);
		dns_message_settsigkey(uctx->updatemsg, NULL);

		timeout = client->update_timeout / uctx->nservers;
		if (timeout < MIN_UPDATE_TIMEOUT)
			timeout = MIN_UPDATE_TIMEOUT;
		result = dns_request_createvia3(uctx->view->requestmgr,
						uctx->updatemsg,
						NULL,
						uctx->currentserver, 0,
						uctx->tsigkey,
						timeout,
						client->update_udptimeout,
						client->update_udpretries,
						client->task,
						update_done, uctx,
						&uctx->updatereq);
		UNLOCK(&uctx->lock);

		if (result == ISC_R_SUCCESS) {
			/* XXX: should we keep the 'done' state here? */
			uctx->state = dns_clientupdatestate_sent;
			return;
		}
	} else
		UNLOCK(&uctx->lock);

	update_sendevent(uctx, result);
}

static isc_result_t
send_update(updatectx_t *uctx) {
	isc_result_t result;
	dns_name_t *name = NULL;
	dns_rdataset_t *rdataset = NULL;
	dns_client_t *client = uctx->client;
	unsigned int timeout;

	REQUIRE(uctx->zonename != NULL && uctx->currentserver != NULL);

	result = dns_message_gettempname(uctx->updatemsg, &name);
	if (result != ISC_R_SUCCESS)
		return (result);
	dns_name_init(name, NULL);
	dns_name_clone(uctx->zonename, name);
	result = dns_message_gettemprdataset(uctx->updatemsg, &rdataset);
	if (result != ISC_R_SUCCESS) {
		dns_message_puttempname(uctx->updatemsg, &name);
		return (result);
	}
	dns_rdataset_makequestion(rdataset, uctx->rdclass, dns_rdatatype_soa);
	ISC_LIST_INIT(name->list);
	ISC_LIST_APPEND(name->list, rdataset, link);
	dns_message_addname(uctx->updatemsg, name, DNS_SECTION_ZONE);
	if (uctx->tsigkey == NULL && uctx->sig0key != NULL) {
		result = dns_message_setsig0key(uctx->updatemsg,
						uctx->sig0key);
		if (result != ISC_R_SUCCESS)
			return (result);
	}
	timeout = client->update_timeout / uctx->nservers;
	if (timeout < MIN_UPDATE_TIMEOUT)
		timeout = MIN_UPDATE_TIMEOUT;
	result = dns_request_createvia3(uctx->view->requestmgr,
					uctx->updatemsg,
					NULL, uctx->currentserver, 0,
					uctx->tsigkey, timeout,
					client->update_udptimeout,
					client->update_udpretries,
					client->task, update_done, uctx,
					&uctx->updatereq);
	if (result == ISC_R_SUCCESS &&
	    uctx->state == dns_clientupdatestate_prepare) {
		uctx->state = dns_clientupdatestate_sent;
	}

	return (result);
}

static void
resolveaddr_done(isc_task_t *task, isc_event_t *event) {
	isc_result_t result;
	int family;
	dns_rdatatype_t qtype;
	dns_clientresevent_t *rev = (dns_clientresevent_t *)event;
	dns_name_t *name;
	dns_rdataset_t *rdataset;
	updatectx_t *uctx;
	isc_boolean_t completed = ISC_FALSE;

	UNUSED(task);

	REQUIRE(event->ev_arg != NULL);
	uctx = *(updatectx_t **)event->ev_arg;
	REQUIRE(UCTX_VALID(uctx));

	if (event->ev_arg == &uctx->bp4) {
		family = AF_INET;
		qtype = dns_rdatatype_a;
		LOCK(&uctx->lock);
		dns_client_destroyrestrans(&uctx->restrans);
		UNLOCK(&uctx->lock);
	} else {
		INSIST(event->ev_arg == &uctx->bp6);
		family = AF_INET6;
		qtype = dns_rdatatype_aaaa;
		LOCK(&uctx->lock);
		dns_client_destroyrestrans(&uctx->restrans2);
		UNLOCK(&uctx->lock);
	}

	result = rev->result;
	if (result != ISC_R_SUCCESS)
		goto done;

	for (name = ISC_LIST_HEAD(rev->answerlist); name != NULL;
	     name = ISC_LIST_NEXT(name, link)) {
		for (rdataset = ISC_LIST_HEAD(name->list);
		     rdataset != NULL;
		     rdataset = ISC_LIST_NEXT(rdataset, link)) {
			if (!dns_rdataset_isassociated(rdataset))
				continue;
			if (rdataset->type != qtype)
				continue;

			for (result = dns_rdataset_first(rdataset);
			     result == ISC_R_SUCCESS;
			     result = dns_rdataset_next(rdataset)) {
				dns_rdata_t rdata;
				dns_rdata_in_a_t rdata_a;
				dns_rdata_in_aaaa_t rdata_aaaa;
				isc_sockaddr_t *sa;

				sa = isc_mem_get(uctx->client->mctx,
						 sizeof(*sa));
				if (sa == NULL) {
					/*
					 * If we fail to get a sockaddr,
					 we simply move forward with the
					 * addresses we've got so far.
					 */
					goto done;
				}

				dns_rdata_init(&rdata);
				switch (family) {
				case AF_INET:
					dns_rdataset_current(rdataset, &rdata);
					result = dns_rdata_tostruct(&rdata, &rdata_a,
							   NULL);
					RUNTIME_CHECK(result == ISC_R_SUCCESS);
					isc_sockaddr_fromin(sa,
							    &rdata_a.in_addr,
							    53);
					dns_rdata_freestruct(&rdata_a);
					break;
				case AF_INET6:
					dns_rdataset_current(rdataset, &rdata);
					result = dns_rdata_tostruct(&rdata, &rdata_aaaa,
							   NULL);
					RUNTIME_CHECK(result == ISC_R_SUCCESS);
					isc_sockaddr_fromin6(sa,
							     &rdata_aaaa.in6_addr,
							     53);
					dns_rdata_freestruct(&rdata_aaaa);
					break;
				}

				ISC_LINK_INIT(sa, link);
				ISC_LIST_APPEND(uctx->servers, sa, link);
				uctx->nservers++;
			}
		}
	}

 done:
	dns_client_freeresanswer(uctx->client, &rev->answerlist);
	isc_event_free(&event);

	LOCK(&uctx->lock);
	if (uctx->restrans == NULL && uctx->restrans2 == NULL)
		completed = ISC_TRUE;
	UNLOCK(&uctx->lock);

	if (completed) {
		INSIST(uctx->currentserver == NULL);
		uctx->currentserver = ISC_LIST_HEAD(uctx->servers);
		if (uctx->currentserver != NULL && !uctx->canceled)
			send_update(uctx);
		else {
			if (result == ISC_R_SUCCESS)
				result = ISC_R_NOTFOUND;
			update_sendevent(uctx, result);
		}
	}
}

static isc_result_t
process_soa(updatectx_t *uctx, dns_rdataset_t *soaset, dns_name_t *soaname) {
	isc_result_t result;
	dns_rdata_t soarr = DNS_RDATA_INIT;
	dns_rdata_soa_t soa;
	dns_name_t primary;

	result = dns_rdataset_first(soaset);
	if (result != ISC_R_SUCCESS)
		return (result);
	dns_rdata_init(&soarr);
	dns_rdataset_current(soaset, &soarr);
	result = dns_rdata_tostruct(&soarr, &soa, NULL);
	if (result != ISC_R_SUCCESS)
		return (result);

	dns_name_init(&primary, NULL);
	dns_name_clone(&soa.origin, &primary);

	if (uctx->zonename == NULL) {
		uctx->zonename = dns_fixedname_name(&uctx->zonefname);
		result = dns_name_copy(soaname, uctx->zonename, NULL);
		if (result != ISC_R_SUCCESS)
			goto out;
	}

	if (uctx->currentserver != NULL)
		result = send_update(uctx);
	else {
		/*
		 * Get addresses of the primary server.  We don't use the ADB
		 * feature so that we could avoid caching data.
		 */
		LOCK(&uctx->lock);
		uctx->bp4 = uctx;
		result = dns_client_startresolve(uctx->client, &primary,
						 uctx->rdclass,
						 dns_rdatatype_a,
						 0, uctx->client->task,
						 resolveaddr_done, &uctx->bp4,
						 &uctx->restrans);
		if (result == ISC_R_SUCCESS) {
			uctx->bp6 = uctx;
			result = dns_client_startresolve(uctx->client,
							 &primary,
							 uctx->rdclass,
							 dns_rdatatype_aaaa,
							 0, uctx->client->task,
							 resolveaddr_done,
							 &uctx->bp6,
							 &uctx->restrans2);
		}
		UNLOCK(&uctx->lock);
	}

 out:
	dns_rdata_freestruct(&soa);

	return (result);
}

static void
receive_soa(isc_task_t *task, isc_event_t *event) {
	dns_requestevent_t *reqev = NULL;
	updatectx_t *uctx;
	dns_client_t *client;
	isc_result_t result, eresult;
	dns_request_t *request;
	dns_message_t *rcvmsg = NULL;
	dns_section_t section;
	dns_rdataset_t *soaset = NULL;
	int pass = 0;
	dns_name_t *name;
	dns_message_t *soaquery = NULL;
	isc_sockaddr_t *addr;
	isc_boolean_t seencname = ISC_FALSE;
	isc_boolean_t droplabel = ISC_FALSE;
	dns_name_t tname;
	unsigned int nlabels;

	UNUSED(task);

	REQUIRE(event->ev_type == DNS_EVENT_REQUESTDONE);
	reqev = (dns_requestevent_t *)event;
	request = reqev->request;
	result = eresult = reqev->result;
	POST(result);
	uctx = reqev->ev_arg;
	client = uctx->client;
	soaquery = uctx->soaquery;
	addr = uctx->currentserver;
	INSIST(addr != NULL);

	isc_event_free(&event);

	if (eresult != ISC_R_SUCCESS) {
		result = eresult;
		goto out;
	}

	result = dns_message_create(uctx->client->mctx,
				    DNS_MESSAGE_INTENTPARSE, &rcvmsg);
	if (result != ISC_R_SUCCESS)
		goto out;
	result = dns_request_getresponse(request, rcvmsg,
					 DNS_MESSAGEPARSE_PRESERVEORDER);

	if (result == DNS_R_TSIGERRORSET) {
		dns_request_t *newrequest = NULL;

		/* Retry SOA request without TSIG */
		dns_message_destroy(&rcvmsg);
		dns_message_renderreset(uctx->soaquery);
		result = dns_request_createvia3(uctx->view->requestmgr,
						uctx->soaquery, NULL, addr, 0,
						NULL,
						client->find_timeout * 20,
						client->find_timeout, 3,
						uctx->client->task,
						receive_soa, uctx,
						&newrequest);
		if (result == ISC_R_SUCCESS) {
			LOCK(&uctx->lock);
			dns_request_destroy(&uctx->soareq);
			uctx->soareq = newrequest;
			UNLOCK(&uctx->lock);

			return;
		}
		goto out;
	}

	section = DNS_SECTION_ANSWER;
	POST(section);

	if (rcvmsg->rcode != dns_rcode_noerror &&
	    rcvmsg->rcode != dns_rcode_nxdomain) {
		result = rcode2result(rcvmsg->rcode);
		goto out;
	}

 lookforsoa:
	if (pass == 0)
		section = DNS_SECTION_ANSWER;
	else if (pass == 1)
		section = DNS_SECTION_AUTHORITY;
	else {
		droplabel = ISC_TRUE;
		goto out;
	}

	result = dns_message_firstname(rcvmsg, section);
	if (result != ISC_R_SUCCESS) {
		pass++;
		goto lookforsoa;
	}
	while (result == ISC_R_SUCCESS) {
		name = NULL;
		dns_message_currentname(rcvmsg, section, &name);
		soaset = NULL;
		result = dns_message_findtype(name, dns_rdatatype_soa, 0,
					      &soaset);
		if (result == ISC_R_SUCCESS)
			break;
		if (section == DNS_SECTION_ANSWER) {
			dns_rdataset_t *tset = NULL;
			if (dns_message_findtype(name, dns_rdatatype_cname, 0,
						 &tset) == ISC_R_SUCCESS
			    ||
			    dns_message_findtype(name, dns_rdatatype_dname, 0,
						 &tset) == ISC_R_SUCCESS
			    )
			{
				seencname = ISC_TRUE;
				break;
			}
		}

		result = dns_message_nextname(rcvmsg, section);
	}

	if (soaset == NULL && !seencname) {
		pass++;
		goto lookforsoa;
	}

	if (seencname) {
		droplabel = ISC_TRUE;
		goto out;
	}

	result = process_soa(uctx, soaset, name);

 out:
	if (droplabel) {
		result = dns_message_firstname(soaquery, DNS_SECTION_QUESTION);
		INSIST(result == ISC_R_SUCCESS);
		name = NULL;
		dns_message_currentname(soaquery, DNS_SECTION_QUESTION, &name);
		nlabels = dns_name_countlabels(name);
		if (nlabels == 1)
			result = DNS_R_SERVFAIL; /* is there a better error? */
		else {
			dns_name_init(&tname, NULL);
			dns_name_getlabelsequence(name, 1, nlabels - 1,
						  &tname);
			dns_name_clone(&tname, name);
			dns_request_destroy(&request);
			LOCK(&uctx->lock);
			uctx->soareq = NULL;
			UNLOCK(&uctx->lock);
			dns_message_renderreset(soaquery);
			dns_message_settsigkey(soaquery, NULL);
			result = dns_request_createvia3(uctx->view->requestmgr,
							soaquery, NULL,
							uctx->currentserver, 0,
							uctx->tsigkey,
							client->find_timeout *
							20,
							client->find_timeout,
							3, client->task,
							receive_soa, uctx,
							&uctx->soareq);
		}
	}

	if (!droplabel || result != ISC_R_SUCCESS) {
		dns_message_destroy(&uctx->soaquery);
		LOCK(&uctx->lock);
		dns_request_destroy(&uctx->soareq);
		UNLOCK(&uctx->lock);
	}

	if (rcvmsg != NULL)
		dns_message_destroy(&rcvmsg);

	if (result != ISC_R_SUCCESS)
		update_sendevent(uctx, result);
}

static isc_result_t
request_soa(updatectx_t *uctx) {
	isc_result_t result;
	dns_message_t *soaquery = uctx->soaquery;
	dns_name_t *name = NULL;
	dns_rdataset_t *rdataset = NULL;

	if (soaquery == NULL) {
		result = dns_message_create(uctx->client->mctx,
					    DNS_MESSAGE_INTENTRENDER,
					    &soaquery);
		if (result != ISC_R_SUCCESS)
			return (result);
	}
	soaquery->flags |= DNS_MESSAGEFLAG_RD;
	result = dns_message_gettempname(soaquery, &name);
	if (result != ISC_R_SUCCESS)
		goto fail;
	result = dns_message_gettemprdataset(soaquery, &rdataset);
	if (result != ISC_R_SUCCESS)
		goto fail;
	dns_rdataset_makequestion(rdataset, uctx->rdclass, dns_rdatatype_soa);
	dns_name_clone(uctx->firstname, name);
	ISC_LIST_APPEND(name->list, rdataset, link);
	dns_message_addname(soaquery, name, DNS_SECTION_QUESTION);
	rdataset = NULL;
	name = NULL;

	result = dns_request_createvia3(uctx->view->requestmgr,
					soaquery, NULL, uctx->currentserver, 0,
					uctx->tsigkey,
					uctx->client->find_timeout * 20,
					uctx->client->find_timeout, 3,
					uctx->client->task, receive_soa, uctx,
					&uctx->soareq);
	if (result == ISC_R_SUCCESS) {
		uctx->soaquery = soaquery;
		return (ISC_R_SUCCESS);
	}

 fail:
	if (rdataset != NULL) {
		ISC_LIST_UNLINK(name->list, rdataset, link); /* for safety */
		dns_message_puttemprdataset(soaquery, &rdataset);
	}
	if (name != NULL)
		dns_message_puttempname(soaquery, &name);
	dns_message_destroy(&soaquery);

	return (result);
}

static void
resolvesoa_done(isc_task_t *task, isc_event_t *event) {
	dns_clientresevent_t *rev = (dns_clientresevent_t *)event;
	updatectx_t *uctx;
	dns_name_t *name, tname;
	dns_rdataset_t *rdataset = NULL;
	isc_result_t result = rev->result;
	unsigned int nlabels;

	UNUSED(task);

	uctx = event->ev_arg;
	REQUIRE(UCTX_VALID(uctx));

	LOCK(&uctx->lock);
	dns_client_destroyrestrans(&uctx->restrans);
	UNLOCK(&uctx->lock);

	uctx = event->ev_arg;
	if (result != ISC_R_SUCCESS &&
	    result != DNS_R_NCACHENXDOMAIN &&
	    result != DNS_R_NCACHENXRRSET) {
		/* XXX: what about DNSSEC failure? */
		goto out;
	}

	for (name = ISC_LIST_HEAD(rev->answerlist); name != NULL;
	     name = ISC_LIST_NEXT(name, link)) {
		for (rdataset = ISC_LIST_HEAD(name->list);
		     rdataset != NULL;
		     rdataset = ISC_LIST_NEXT(rdataset, link)) {
			if (dns_rdataset_isassociated(rdataset) &&
			    rdataset->type == dns_rdatatype_soa)
				break;
		}
	}

	if (rdataset == NULL) {
		/* Drop one label and retry resolution. */
		nlabels = dns_name_countlabels(&uctx->soaqname);
		if (nlabels == 1) {
			result = DNS_R_SERVFAIL; /* is there a better error? */
			goto out;
		}
		dns_name_init(&tname, NULL);
		dns_name_getlabelsequence(&uctx->soaqname, 1, nlabels - 1,
					  &tname);
		dns_name_clone(&tname, &uctx->soaqname);

		result = dns_client_startresolve(uctx->client, &uctx->soaqname,
						 uctx->rdclass,
						 dns_rdatatype_soa, 0,
						 uctx->client->task,
						 resolvesoa_done, uctx,
						 &uctx->restrans);
	} else
		result = process_soa(uctx, rdataset, &uctx->soaqname);

 out:
	dns_client_freeresanswer(uctx->client, &rev->answerlist);
	isc_event_free(&event);

	if (result != ISC_R_SUCCESS)
		update_sendevent(uctx, result);
}

static isc_result_t
copy_name(isc_mem_t *mctx, dns_message_t *msg, dns_name_t *name,
	  dns_name_t **newnamep)
{
	isc_result_t result;
	dns_name_t *newname = NULL;
	isc_region_t r;
	isc_buffer_t *namebuf = NULL, *rdatabuf = NULL;
	dns_rdatalist_t *rdatalist;
	dns_rdataset_t *rdataset, *newrdataset;
	dns_rdata_t rdata = DNS_RDATA_INIT, *newrdata;

	result = dns_message_gettempname(msg, &newname);
	if (result != ISC_R_SUCCESS)
		return (result);
	result = isc_buffer_allocate(mctx, &namebuf, DNS_NAME_MAXWIRE);
	if (result != ISC_R_SUCCESS)
		goto fail;
	dns_name_init(newname, NULL);
	dns_name_setbuffer(newname, namebuf);
	dns_message_takebuffer(msg, &namebuf);
	result = dns_name_copy(name, newname, NULL);
	if (result != ISC_R_SUCCESS)
		goto fail;

	for (rdataset = ISC_LIST_HEAD(name->list); rdataset != NULL;
	     rdataset = ISC_LIST_NEXT(rdataset, link)) {
		rdatalist = NULL;
		result = dns_message_gettemprdatalist(msg, &rdatalist);
		if (result != ISC_R_SUCCESS)
			goto fail;
		dns_rdatalist_init(rdatalist);
		rdatalist->type = rdataset->type;
		rdatalist->rdclass = rdataset->rdclass;
		rdatalist->covers = rdataset->covers;
		rdatalist->ttl = rdataset->ttl;

		result = dns_rdataset_first(rdataset);
		while (result == ISC_R_SUCCESS) {
			dns_rdata_reset(&rdata);
			dns_rdataset_current(rdataset, &rdata);

			newrdata = NULL;
			result = dns_message_gettemprdata(msg, &newrdata);
			if (result != ISC_R_SUCCESS)
				goto fail;
			dns_rdata_toregion(&rdata, &r);
			rdatabuf = NULL;
			result = isc_buffer_allocate(mctx, &rdatabuf,
						     r.length);
			if (result != ISC_R_SUCCESS)
				goto fail;
			isc_buffer_putmem(rdatabuf, r.base, r.length);
			isc_buffer_usedregion(rdatabuf, &r);
			dns_rdata_init(newrdata);
			dns_rdata_fromregion(newrdata, rdata.rdclass,
					     rdata.type, &r);
			newrdata->flags = rdata.flags;

			ISC_LIST_APPEND(rdatalist->rdata, newrdata, link);
			dns_message_takebuffer(msg, &rdatabuf);

			result = dns_rdataset_next(rdataset);
		}

		newrdataset = NULL;
		result = dns_message_gettemprdataset(msg, &newrdataset);
		if (result != ISC_R_SUCCESS)
			goto fail;
		dns_rdataset_init(newrdataset);
		dns_rdatalist_tordataset(rdatalist, newrdataset);

		ISC_LIST_APPEND(newname->list, newrdataset, link);
	}

	*newnamep = newname;

	return (ISC_R_SUCCESS);

 fail:
	dns_message_puttempname(msg, &newname);

	return (result);

}

static void
internal_update_callback(isc_task_t *task, isc_event_t *event) {
	updatearg_t *uarg = event->ev_arg;
	dns_clientupdateevent_t *uev = (dns_clientupdateevent_t *)event;

	UNUSED(task);

	LOCK(&uarg->lock);

	uarg->result = uev->result;

	dns_client_destroyupdatetrans(&uarg->trans);
	isc_event_free(&event);

	if (!uarg->canceled) {
		UNLOCK(&uarg->lock);

		/* Exit from the internal event loop */
		isc_app_ctxsuspend(uarg->actx);
	} else {
		/*
		 * We have already exited from the loop (due to some
		 * unexpected event).  Just clean the arg up.
		 */
		UNLOCK(&uarg->lock);
		DESTROYLOCK(&uarg->lock);
		isc_mem_put(uarg->client->mctx, uarg, sizeof(*uarg));
	}
}

isc_result_t
dns_client_update(dns_client_t *client, dns_rdataclass_t rdclass,
		  dns_name_t *zonename, dns_namelist_t *prerequisites,
		  dns_namelist_t *updates, isc_sockaddrlist_t *servers,
		  dns_tsec_t *tsec, unsigned int options)
{
	isc_result_t result;
	isc_appctx_t *actx;
	updatearg_t *uarg;

	REQUIRE(DNS_CLIENT_VALID(client));

	if ((client->attributes & DNS_CLIENTATTR_OWNCTX) == 0 &&
	    (options & DNS_CLIENTRESOPT_ALLOWRUN) == 0) {
		/*
		 * If the client is run under application's control, we need
		 * to create a new running (sub)environment for this
		 * particular resolution.
		 */
		return (ISC_R_NOTIMPLEMENTED); /* XXXTBD */
	} else
		actx = client->actx;

	uarg = isc_mem_get(client->mctx, sizeof(*uarg));
	if (uarg == NULL)
		return (ISC_R_NOMEMORY);

	result = isc_mutex_init(&uarg->lock);
	if (result != ISC_R_SUCCESS) {
		isc_mem_put(client->mctx, uarg, sizeof(*uarg));
		return (result);
	}

	uarg->actx = actx;
	uarg->client = client;
	uarg->result = ISC_R_FAILURE;
	uarg->trans = NULL;
	uarg->canceled = ISC_FALSE;

	result = dns_client_startupdate(client, rdclass, zonename,
					prerequisites, updates, servers,
					tsec, options, client->task,
					internal_update_callback, uarg,
					&uarg->trans);
	if (result != ISC_R_SUCCESS) {
		DESTROYLOCK(&uarg->lock);
		isc_mem_put(client->mctx, uarg, sizeof(*uarg));
		return (result);
	}

	/*
	 * Start internal event loop.  It blocks until the entire process
	 * is completed.
	 */
	result = isc_app_ctxrun(actx);

	LOCK(&uarg->lock);
	if (result == ISC_R_SUCCESS || result == ISC_R_SUSPEND)
		result = uarg->result;

	if (uarg->trans != NULL) {
		/*
		 * Unusual termination (perhaps due to signal).  We need some
		 * tricky cleanup process.
		 */
		uarg->canceled = ISC_TRUE;
		dns_client_cancelupdate(uarg->trans);

		UNLOCK(&uarg->lock);

		/* uarg will be freed in the event handler. */
	} else {
		UNLOCK(&uarg->lock);

		DESTROYLOCK(&uarg->lock);
		isc_mem_put(client->mctx, uarg, sizeof(*uarg));
	}

	return (result);
}

isc_result_t
dns_client_startupdate(dns_client_t *client, dns_rdataclass_t rdclass,
		       dns_name_t *zonename, dns_namelist_t *prerequisites,
		       dns_namelist_t *updates, isc_sockaddrlist_t *servers,
		       dns_tsec_t *tsec, unsigned int options,
		       isc_task_t *task, isc_taskaction_t action, void *arg,
		       dns_clientupdatetrans_t **transp)
{
	dns_view_t *view = NULL;
	isc_result_t result;
	dns_name_t *name, *newname;
	updatectx_t *uctx;
	isc_task_t *clone = NULL;
	dns_section_t section = DNS_SECTION_UPDATE;
	isc_sockaddr_t *server, *sa = NULL;
	dns_tsectype_t tsectype = dns_tsectype_none;

	UNUSED(options);

	REQUIRE(DNS_CLIENT_VALID(client));
	REQUIRE(transp != NULL && *transp == NULL);
	REQUIRE(updates != NULL);
	REQUIRE(task != NULL);

	if (tsec != NULL) {
		tsectype = dns_tsec_gettype(tsec);
		if (tsectype != dns_tsectype_tsig)
			return (ISC_R_NOTIMPLEMENTED); /* XXX */
	}

	LOCK(&client->lock);
	result = dns_viewlist_find(&client->viewlist, DNS_CLIENTVIEW_NAME,
				   rdclass, &view);
	UNLOCK(&client->lock);
	if (result != ISC_R_SUCCESS)
		return (result);

	/* Create a context and prepare some resources */
	uctx = isc_mem_get(client->mctx, sizeof(*uctx));
	if (uctx == NULL) {
		dns_view_detach(&view);
		return (ISC_R_NOMEMORY);
	}
	result = isc_mutex_init(&uctx->lock);
	if (result != ISC_R_SUCCESS) {
		dns_view_detach(&view);
		isc_mem_put(client->mctx, uctx, sizeof(*uctx));
		return (ISC_R_NOMEMORY);
	}
	clone = NULL;
	isc_task_attach(task, &clone);
	uctx->client = client;
	ISC_LINK_INIT(uctx, link);
	uctx->state = dns_clientupdatestate_prepare;
	uctx->view = view;
	uctx->rdclass = rdclass;
	uctx->canceled = ISC_FALSE;
	uctx->updatemsg = NULL;
	uctx->soaquery = NULL;
	uctx->updatereq = NULL;
	uctx->restrans = NULL;
	uctx->restrans2 = NULL;
	uctx->bp4 = NULL;
	uctx->bp6 = NULL;
	uctx->soareq = NULL;
	uctx->event = NULL;
	uctx->tsigkey = NULL;
	uctx->sig0key = NULL;
	uctx->zonename = NULL;
	dns_name_init(&uctx->soaqname, NULL);
	ISC_LIST_INIT(uctx->servers);
	uctx->nservers = 0;
	uctx->currentserver = NULL;
	dns_fixedname_init(&uctx->zonefname);
	if (tsec != NULL)
		dns_tsec_getkey(tsec, &uctx->tsigkey);
	uctx->event = (dns_clientupdateevent_t *)
		isc_event_allocate(client->mctx, clone, DNS_EVENT_UPDATEDONE,
				   action, arg, sizeof(*uctx->event));
	if (uctx->event == NULL)
		goto fail;
	if (zonename != NULL) {
		uctx->zonename = dns_fixedname_name(&uctx->zonefname);
		result = dns_name_copy(zonename, uctx->zonename, NULL);
	}
	if (servers != NULL) {
		for (server = ISC_LIST_HEAD(*servers);
		     server != NULL;
		     server = ISC_LIST_NEXT(server, link)) {
			sa = isc_mem_get(client->mctx, sizeof(*sa));
			if (sa == NULL)
				goto fail;
			sa->type = server->type;
			sa->length = server->length;
			ISC_LINK_INIT(sa, link);
			ISC_LIST_APPEND(uctx->servers, sa, link);
			if (uctx->currentserver == NULL)
				uctx->currentserver = sa;
			uctx->nservers++;
		}
	}

	/* Make update message */
	result = dns_message_create(client->mctx, DNS_MESSAGE_INTENTRENDER,
				    &uctx->updatemsg);
	if (result != ISC_R_SUCCESS)
		goto fail;
	uctx->updatemsg->opcode = dns_opcode_update;

	if (prerequisites != NULL) {
		for (name = ISC_LIST_HEAD(*prerequisites); name != NULL;
		     name = ISC_LIST_NEXT(name, link)) {
			newname = NULL;
			result = copy_name(client->mctx, uctx->updatemsg,
					   name, &newname);
			if (result != ISC_R_SUCCESS)
				goto fail;
			dns_message_addname(uctx->updatemsg, newname,
					    DNS_SECTION_PREREQUISITE);
		}
	}

	for (name = ISC_LIST_HEAD(*updates); name != NULL;
	     name = ISC_LIST_NEXT(name, link)) {
		newname = NULL;
		result = copy_name(client->mctx, uctx->updatemsg, name,
				   &newname);
		if (result != ISC_R_SUCCESS)
			goto fail;
		dns_message_addname(uctx->updatemsg, newname,
				    DNS_SECTION_UPDATE);
	}

	uctx->firstname = NULL;
	result = dns_message_firstname(uctx->updatemsg, section);
	if (result == ISC_R_NOMORE) {
		section = DNS_SECTION_PREREQUISITE;
		result = dns_message_firstname(uctx->updatemsg, section);
	}
	if (result != ISC_R_SUCCESS)
		goto fail;
	dns_message_currentname(uctx->updatemsg, section, &uctx->firstname);

	uctx->magic = UCTX_MAGIC;

	LOCK(&client->lock);
	ISC_LIST_APPEND(client->updatectxs, uctx, link);
	UNLOCK(&client->lock);

	if (uctx->zonename != NULL && uctx->currentserver != NULL) {
		result = send_update(uctx);
		if (result != ISC_R_SUCCESS)
			goto fail;
	} else if (uctx->currentserver != NULL) {
		result = request_soa(uctx);
		if (result != ISC_R_SUCCESS)
			goto fail;
	} else {
		dns_name_clone(uctx->firstname, &uctx->soaqname);
		result = dns_client_startresolve(uctx->client, &uctx->soaqname,
						 uctx->rdclass,
						 dns_rdatatype_soa, 0,
						 client->task, resolvesoa_done,
						 uctx, &uctx->restrans);
		if (result != ISC_R_SUCCESS)
			goto fail;
	}

	*transp = (dns_clientupdatetrans_t *)uctx;

	return (ISC_R_SUCCESS);

 fail:
	if (ISC_LINK_LINKED(uctx, link)) {
		LOCK(&client->lock);
		ISC_LIST_UNLINK(client->updatectxs, uctx, link);
		UNLOCK(&client->lock);
	}
	if (uctx->updatemsg != NULL)
		dns_message_destroy(&uctx->updatemsg);
	while ((sa = ISC_LIST_HEAD(uctx->servers)) != NULL) {
		ISC_LIST_UNLINK(uctx->servers, sa, link);
		isc_mem_put(client->mctx, sa, sizeof(*sa));
	}
	if (uctx->event != NULL)
		isc_event_free(ISC_EVENT_PTR(&uctx->event));
	if (uctx->tsigkey != NULL)
		dns_tsigkey_detach(&uctx->tsigkey);
	isc_task_detach(&clone);
	DESTROYLOCK(&uctx->lock);
	uctx->magic = 0;
	isc_mem_put(client->mctx, uctx, sizeof(*uctx));
	dns_view_detach(&view);

	return (result);
}

void
dns_client_cancelupdate(dns_clientupdatetrans_t *trans) {
	updatectx_t *uctx;

	REQUIRE(trans != NULL);
	uctx = (updatectx_t *)trans;
	REQUIRE(UCTX_VALID(uctx));

	LOCK(&uctx->lock);

	if (!uctx->canceled) {
		uctx->canceled = ISC_TRUE;
		if (uctx->updatereq != NULL)
			dns_request_cancel(uctx->updatereq);
		if (uctx->soareq != NULL)
			dns_request_cancel(uctx->soareq);
		if (uctx->restrans != NULL)
			dns_client_cancelresolve(uctx->restrans);
		if (uctx->restrans2 != NULL)
			dns_client_cancelresolve(uctx->restrans2);
	}

	UNLOCK(&uctx->lock);
}

void
dns_client_destroyupdatetrans(dns_clientupdatetrans_t **transp) {
	updatectx_t *uctx;
	isc_mem_t *mctx;
	dns_client_t *client;
	isc_boolean_t need_destroyclient = ISC_FALSE;
	isc_sockaddr_t *sa;

	REQUIRE(transp != NULL);
	uctx = (updatectx_t *)*transp;
	REQUIRE(UCTX_VALID(uctx));
	client = uctx->client;
	REQUIRE(DNS_CLIENT_VALID(client));
	REQUIRE(uctx->updatereq == NULL && uctx->updatemsg == NULL &&
		uctx->soareq == NULL && uctx->soaquery == NULL &&
		uctx->event == NULL && uctx->tsigkey == NULL &&
		uctx->sig0key == NULL);

	mctx = client->mctx;
	dns_view_detach(&uctx->view);
	while ((sa = ISC_LIST_HEAD(uctx->servers)) != NULL) {
		ISC_LIST_UNLINK(uctx->servers, sa, link);
		isc_mem_put(mctx, sa, sizeof(*sa));
	}

	LOCK(&client->lock);

	INSIST(ISC_LINK_LINKED(uctx, link));
	ISC_LIST_UNLINK(client->updatectxs, uctx, link);

	if (client->references == 0 && ISC_LIST_EMPTY(client->resctxs) &&
	    ISC_LIST_EMPTY(client->reqctxs) &&
	    ISC_LIST_EMPTY(client->updatectxs))
		need_destroyclient = ISC_TRUE;

	UNLOCK(&client->lock);

	DESTROYLOCK(&uctx->lock);
	uctx->magic = 0;

	isc_mem_put(mctx, uctx, sizeof(*uctx));

	if (need_destroyclient)
		destroyclient(&client);

	*transp = NULL;
}

isc_mem_t *
dns_client_mctx(dns_client_t *client) {

	REQUIRE(DNS_CLIENT_VALID(client));
	return (client->mctx);
}

typedef struct {
	isc_buffer_t 	buffer;
	dns_rdataset_t	rdataset;
	dns_rdatalist_t	rdatalist;
	dns_rdata_t	rdata;
	size_t		size;
	isc_mem_t *	mctx;
	unsigned char	data[FLEXIBLE_ARRAY_MEMBER];
} dns_client_updaterec_t;

isc_result_t
dns_client_updaterec(dns_client_updateop_t op, dns_name_t *owner,
		     dns_rdatatype_t type, dns_rdata_t *source,
		     dns_ttl_t ttl, dns_name_t *target,
		     dns_rdataset_t *rdataset, dns_rdatalist_t *rdatalist,
		     dns_rdata_t *rdata, isc_mem_t *mctx)
{
	dns_client_updaterec_t *updaterec = NULL;
	size_t size = offsetof(dns_client_updaterec_t, data);

	REQUIRE(op < updateop_max);
	REQUIRE(owner != NULL);
	REQUIRE((rdataset != NULL && rdatalist != NULL && rdata != NULL) ||
		(rdataset == NULL && rdatalist == NULL && rdata == NULL &&
		 mctx != NULL));
	if (op == updateop_add)
		REQUIRE(source != NULL);
	if (source != NULL) {
		REQUIRE(source->type == type);
		REQUIRE(op == updateop_add || op == updateop_delete ||
			op == updateop_exist);
	}

	size += owner->length;
	if (source != NULL)
		size += source->length;

	if (rdataset == NULL) {
		updaterec = isc_mem_get(mctx, size);
		if (updaterec == NULL)
			return (ISC_R_NOMEMORY);
		rdataset = &updaterec->rdataset;
		rdatalist = &updaterec->rdatalist;
		rdata = &updaterec->rdata;
		dns_rdataset_init(rdataset);
		dns_rdatalist_init(&updaterec->rdatalist);
		dns_rdata_init(&updaterec->rdata);
		isc_buffer_init(&updaterec->buffer, updaterec->data,
				size - offsetof(dns_client_updaterec_t, data));
		dns_name_copy(owner, target, &updaterec->buffer);
		if (source != NULL) {
			isc_region_t r;
			dns_rdata_clone(source, rdata);
			dns_rdata_toregion(rdata, &r);
			rdata->data = isc_buffer_used(&updaterec->buffer);
			isc_buffer_copyregion(&updaterec->buffer, &r);
		}
		updaterec->mctx = NULL;
		isc_mem_attach(mctx, &updaterec->mctx);
	} else if (source != NULL)
		dns_rdata_clone(source, rdata);

	switch (op) {
	case updateop_add:
		break;
	case updateop_delete:
		if (source != NULL) {
			ttl = 0;
			dns_rdata_makedelete(rdata);
		} else
			dns_rdata_deleterrset(rdata, type);
		break;
	case updateop_notexist:
		dns_rdata_notexist(rdata, type);
		break;
	case updateop_exist:
		if (source == NULL) {
			ttl = 0;
			dns_rdata_exists(rdata, type);
		}
	case updateop_none:
		break;
	default:
		INSIST(0);
	}

	rdatalist->type = rdata->type;
	rdatalist->rdclass = rdata->rdclass;
	if (source != NULL) {
		rdatalist->covers = dns_rdata_covers(rdata);
		rdatalist->ttl = ttl;
	}
	ISC_LIST_APPEND(rdatalist->rdata, rdata, link);
	dns_rdatalist_tordataset(rdatalist, rdataset);
	ISC_LIST_APPEND(target->list, rdataset, link);
	if (updaterec != NULL) {
		target->attributes |= DNS_NAMEATTR_HASUPDATEREC;
		dns_name_setbuffer(target, &updaterec->buffer);
	}
	if (op == updateop_add || op == updateop_delete)
		target->attributes |= DNS_NAMEATTR_UPDATE;
	else
		target->attributes |= DNS_NAMEATTR_PREREQUISITE;
	return (ISC_R_SUCCESS);
}

void
dns_client_freeupdate(dns_name_t **namep) {
	dns_client_updaterec_t *updaterec;
	dns_rdatalist_t *rdatalist;
	dns_rdataset_t *rdataset;
	dns_rdata_t *rdata;
	dns_name_t *name;

	REQUIRE(namep != NULL && *namep != NULL);

	name = *namep;
	for (rdataset = ISC_LIST_HEAD(name->list);
	     rdataset != NULL;
	     rdataset = ISC_LIST_HEAD(name->list)) {
		ISC_LIST_UNLINK(name->list, rdataset, link);
		rdatalist = NULL;
		dns_rdatalist_fromrdataset(rdataset, &rdatalist);
		if (rdatalist == NULL) {
			dns_rdataset_disassociate(rdataset);
			continue;
		}
		for (rdata = ISC_LIST_HEAD(rdatalist->rdata);
		     rdata != NULL;
		     rdata = ISC_LIST_HEAD(rdatalist->rdata))
			ISC_LIST_UNLINK(rdatalist->rdata, rdata, link);
		dns_rdataset_disassociate(rdataset);
	}

	if ((name->attributes & DNS_NAMEATTR_HASUPDATEREC) != 0) {
		updaterec = (dns_client_updaterec_t *)name->buffer;
		INSIST(updaterec != NULL);
		isc_mem_putanddetach(&updaterec->mctx, updaterec,
				     updaterec->size);
		*namep = NULL;
	}
}