Bug Summary

File:var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp
Warning:line 120, column 16
Value stored to 'rectype' during its initialization is never read

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name Unified_cpp_netwerk_dns0.cpp -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=all -relaxed-aliasing -ffp-contract=off -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/netwerk/dns -fcoverage-compilation-dir=/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/netwerk/dns -resource-dir /usr/lib/llvm-18/lib/clang/18 -include /var/lib/jenkins/workspace/firefox-scan-build/config/gcc_hidden.h -include /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/mozilla-config.h -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/stl_wrappers -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/system_wrappers -U _FORTIFY_SOURCE -D _FORTIFY_SOURCE=2 -D DEBUG=1 -D MOZ_HAS_MOZGLUE -D MOZILLA_INTERNAL_API -D IMPL_LIBXUL -D MOZ_SUPPORT_LEAKCHECKING -D STATIC_EXPORTABLE_JS_API -I /var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/netwerk/dns -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/ipc/ipdl/_ipdlheaders -I /var/lib/jenkins/workspace/firefox-scan-build/ipc/chromium/src -I /var/lib/jenkins/workspace/firefox-scan-build/netwerk/base -I /var/lib/jenkins/workspace/firefox-scan-build/netwerk/ipc -I /var/lib/jenkins/workspace/firefox-scan-build/netwerk/protocol/http -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/nspr -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/nss -D MOZILLA_CLIENT -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/x86_64-linux-gnu/c++/14 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/backward -internal-isystem /usr/lib/llvm-18/lib/clang/18/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-error=tautological-type-limit-compare -Wno-invalid-offsetof -Wno-range-loop-analysis -Wno-deprecated-anon-enum-enum-conversion -Wno-deprecated-enum-enum-conversion -Wno-deprecated-this-capture -Wno-inline-new-delete -Wno-error=deprecated-declarations -Wno-error=array-bounds -Wno-error=free-nonheap-object -Wno-error=atomic-alignment -Wno-error=deprecated-builtins -Wno-psabi -Wno-error=builtin-macro-redefined -Wno-vla-cxx-extension -Wno-unknown-warning-option -fdeprecated-macro -ferror-limit 19 -stack-protector 2 -fstack-clash-protection -ftrivial-auto-var-init=pattern -fno-rtti -fgnuc-version=4.2.1 -fno-aligned-allocation -vectorize-loops -vectorize-slp -analyzer-checker optin.performance.Padding -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2024-07-27-022226-2793976-1 -x c++ Unified_cpp_netwerk_dns0.cpp
1/* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
4
5#include "TRRQuery.h"
6
7#include "mozilla/StaticPrefs_network.h"
8#include "mozilla/Telemetry.h"
9#include "nsQueryObject.h"
10#include "TRR.h"
11#include "TRRService.h"
12// Put DNSLogging.h at the end to avoid LOG being overwritten by other headers.
13#include "DNSLogging.h"
14
15namespace mozilla {
16namespace net {
17
18static already_AddRefed<AddrInfo> merge_rrset(AddrInfo* rrto,
19 AddrInfo* rrfrom) {
20 MOZ_ASSERT(rrto && rrfrom)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(rrto && rrfrom)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(rrto && rrfrom))), 0
))) { do { } while (false); MOZ_ReportAssertionFailure("rrto && rrfrom"
, "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp"
, 20); AnnotateMozCrashReason("MOZ_ASSERT" "(" "rrto && rrfrom"
")"); do { *((volatile int*)__null) = 20; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
21 // Each of the arguments are all-IPv4 or all-IPv6 hence judging
22 // by the first element. This is true only for TRR resolutions.
23 bool isIPv6 = rrfrom->Addresses().Length() > 0 &&
24 rrfrom->Addresses()[0].raw.family == PR_AF_INET610;
25
26 nsTArray<NetAddr> addresses;
27 if (isIPv6) {
28 addresses = rrfrom->Addresses().Clone();
29 addresses.AppendElements(rrto->Addresses());
30 } else {
31 addresses = rrto->Addresses().Clone();
32 addresses.AppendElements(rrfrom->Addresses());
33 }
34 auto builder = rrto->Build();
35 builder.SetAddresses(std::move(addresses));
36 return builder.Finish();
37}
38
39void TRRQuery::Cancel(nsresult aStatus) {
40 MutexAutoLock trrlock(mTrrLock);
41 if (mTrrA) {
42 mTrrA->Cancel(aStatus);
43 }
44 if (mTrrAAAA) {
45 mTrrAAAA->Cancel(aStatus);
46 }
47 if (mTrrByType) {
48 mTrrByType->Cancel(aStatus);
49 }
50}
51
52void TRRQuery::MarkSendingTRR(TRR* trr, enum TrrType rectype, MutexAutoLock&) {
53 if (rectype == TRRTYPE_A) {
54 MOZ_ASSERT(!mTrrA)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(!mTrrA)>::isValid, "invalid assertion condition")
; if ((__builtin_expect(!!(!(!!(!mTrrA))), 0))) { do { } while
(false); MOZ_ReportAssertionFailure("!mTrrA", "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp"
, 54); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!mTrrA" ")");
do { *((volatile int*)__null) = 54; __attribute__((nomerge))
::abort(); } while (false); } } while (false);
55 mTrrA = trr;
56 mTrrAUsed = STARTED;
57 } else if (rectype == TRRTYPE_AAAA) {
58 MOZ_ASSERT(!mTrrAAAA)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(!mTrrAAAA)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(!mTrrAAAA))), 0))) { do { } while
(false); MOZ_ReportAssertionFailure("!mTrrAAAA", "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp"
, 58); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!mTrrAAAA" ")"
); do { *((volatile int*)__null) = 58; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
59 mTrrAAAA = trr;
60 mTrrAAAAUsed = STARTED;
61 } else {
62 LOG(("TrrLookup called with bad type set: %d\n", rectype))do { const ::mozilla::LogModule* moz_real_module = mozilla::net
::gHostResolverLog; if ((__builtin_expect(!!(mozilla::detail::
log_test(moz_real_module, mozilla::LogLevel::Debug)), 0))) { mozilla
::detail::log_print(moz_real_module, mozilla::LogLevel::Debug
, "TrrLookup called with bad type set: %d\n", rectype); } } while
(0);
63 MOZ_ASSERT(0)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(0)>::isValid, "invalid assertion condition"); if (
(__builtin_expect(!!(!(!!(0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure
("0", "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp"
, 63); AnnotateMozCrashReason("MOZ_ASSERT" "(" "0" ")"); do {
*((volatile int*)__null) = 63; __attribute__((nomerge)) ::abort
(); } while (false); } } while (false);
64 }
65}
66
67void TRRQuery::PrepareQuery(enum TrrType aRecType,
68 nsTArray<RefPtr<TRR>>& aRequestsToSend) {
69 LOG(("TRR Resolve %s type %d\n", mRecord->host.get(), (int)aRecType))do { const ::mozilla::LogModule* moz_real_module = mozilla::net
::gHostResolverLog; if ((__builtin_expect(!!(mozilla::detail::
log_test(moz_real_module, mozilla::LogLevel::Debug)), 0))) { mozilla
::detail::log_print(moz_real_module, mozilla::LogLevel::Debug
, "TRR Resolve %s type %d\n", mRecord->host.get(), (int)aRecType
); } } while (0);
70 RefPtr<TRR> trr = new TRR(this, mRecord, aRecType);
71
72 {
73 MutexAutoLock trrlock(mTrrLock);
74 MarkSendingTRR(trr, aRecType, trrlock);
75 aRequestsToSend.AppendElement(trr);
76 }
77}
78
79bool TRRQuery::SendQueries(nsTArray<RefPtr<TRR>>& aRequestsToSend) {
80 bool madeQuery = false;
81 mTRRRequestCounter = aRequestsToSend.Length();
82 for (const auto& request : aRequestsToSend) {
83 if (NS_SUCCEEDED(TRRService::Get()->DispatchTRRRequest(request))((bool)(__builtin_expect(!!(!NS_FAILED_impl(TRRService::Get()
->DispatchTRRRequest(request))), 1)))) {
84 madeQuery = true;
85 } else {
86 mTRRRequestCounter--;
87 MutexAutoLock trrlock(mTrrLock);
88 if (request == mTrrA) {
89 mTrrA = nullptr;
90 mTrrAUsed = INIT;
91 }
92 if (request == mTrrAAAA) {
93 mTrrAAAA = nullptr;
94 mTrrAAAAUsed = INIT;
95 }
96 }
97 }
98 aRequestsToSend.Clear();
99 return madeQuery;
100}
101
102nsresult TRRQuery::DispatchLookup(TRR* pushedTRR) {
103 mTrrStart = TimeStamp::Now();
104
105 if (!mRecord->IsAddrRecord()) {
106 return DispatchByTypeLookup(pushedTRR);
107 }
108
109 RefPtr<AddrHostRecord> addrRec = do_QueryObject(mRecord);
110 MOZ_ASSERT(addrRec)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(addrRec)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(addrRec))), 0))) { do { } while
(false); MOZ_ReportAssertionFailure("addrRec", "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp"
, 110); AnnotateMozCrashReason("MOZ_ASSERT" "(" "addrRec" ")"
); do { *((volatile int*)__null) = 110; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
111 if (!addrRec) {
112 return NS_ERROR_UNEXPECTED;
113 }
114
115 mTrrAUsed = INIT;
116 mTrrAAAAUsed = INIT;
117
118 // Always issue both A and AAAA.
119 // When both are complete we filter out the unneeded results.
120 enum TrrType rectype = (mRecord->af == AF_INET610) ? TRRTYPE_AAAA : TRRTYPE_A;
Value stored to 'rectype' during its initialization is never read
121
122 if (pushedTRR) {
123 MutexAutoLock trrlock(mTrrLock);
124 rectype = pushedTRR->Type();
125 MarkSendingTRR(pushedTRR, rectype, trrlock);
126 return NS_OK;
127 }
128
129 // Need to dispatch TRR requests after |mTrrA| and |mTrrAAAA| are set
130 // properly so as to avoid the race when CompleteLookup() is called at the
131 // same time.
132 nsTArray<RefPtr<TRR>> requestsToSend;
133 if ((mRecord->af == AF_UNSPEC0 || mRecord->af == AF_INET610) &&
134 !StaticPrefs::network_dns_disableIPv6()) {
135 PrepareQuery(TRRTYPE_AAAA, requestsToSend);
136 }
137 if (mRecord->af == AF_UNSPEC0 || mRecord->af == AF_INET2) {
138 PrepareQuery(TRRTYPE_A, requestsToSend);
139 }
140
141 if (SendQueries(requestsToSend)) {
142 return NS_OK;
143 }
144
145 return NS_ERROR_UNKNOWN_HOST;
146}
147
148nsresult TRRQuery::DispatchByTypeLookup(TRR* pushedTRR) {
149 RefPtr<TypeHostRecord> typeRec = do_QueryObject(mRecord);
150 MOZ_ASSERT(typeRec)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(typeRec)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(typeRec))), 0))) { do { } while
(false); MOZ_ReportAssertionFailure("typeRec", "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp"
, 150); AnnotateMozCrashReason("MOZ_ASSERT" "(" "typeRec" ")"
); do { *((volatile int*)__null) = 150; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
151 if (!typeRec) {
152 return NS_ERROR_UNEXPECTED;
153 }
154
155 enum TrrType rectype;
156
157 // XXX this could use a more extensible approach.
158 if (mRecord->type == nsIDNSService::RESOLVE_TYPE_TXT) {
159 rectype = TRRTYPE_TXT;
160 } else if (mRecord->type == nsIDNSService::RESOLVE_TYPE_HTTPSSVC) {
161 rectype = TRRTYPE_HTTPSSVC;
162 } else if (pushedTRR) {
163 rectype = pushedTRR->Type();
164 } else {
165 MOZ_ASSERT(false, "Not an expected request type")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(false)>::isValid, "invalid assertion condition");
if ((__builtin_expect(!!(!(!!(false))), 0))) { do { } while (
false); MOZ_ReportAssertionFailure("false" " (" "Not an expected request type"
")", "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp"
, 165); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") ("
"Not an expected request type" ")"); do { *((volatile int*)__null
) = 165; __attribute__((nomerge)) ::abort(); } while (false);
} } while (false);
166 return NS_ERROR_UNKNOWN_HOST;
167 }
168
169 LOG(("TRR Resolve %s type %d\n", typeRec->host.get(), (int)rectype))do { const ::mozilla::LogModule* moz_real_module = mozilla::net
::gHostResolverLog; if ((__builtin_expect(!!(mozilla::detail::
log_test(moz_real_module, mozilla::LogLevel::Debug)), 0))) { mozilla
::detail::log_print(moz_real_module, mozilla::LogLevel::Debug
, "TRR Resolve %s type %d\n", typeRec->host.get(), (int)rectype
); } } while (0);
170 RefPtr<TRR> trr = pushedTRR ? pushedTRR : new TRR(this, mRecord, rectype);
171
172 if (pushedTRR || NS_SUCCEEDED(TRRService::Get()->DispatchTRRRequest(trr))((bool)(__builtin_expect(!!(!NS_FAILED_impl(TRRService::Get()
->DispatchTRRRequest(trr))), 1)))) {
173 MutexAutoLock trrlock(mTrrLock);
174 MOZ_ASSERT(!mTrrByType)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(!mTrrByType)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(!mTrrByType))), 0))) { do { }
while (false); MOZ_ReportAssertionFailure("!mTrrByType", "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp"
, 174); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!mTrrByType"
")"); do { *((volatile int*)__null) = 174; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
175 mTrrByType = trr;
176 return NS_OK;
177 }
178
179 return NS_ERROR_UNKNOWN_HOST;
180}
181
182AHostResolver::LookupStatus TRRQuery::CompleteLookup(
183 nsHostRecord* rec, nsresult status, AddrInfo* aNewRRSet, bool pb,
184 const nsACString& aOriginsuffix, nsHostRecord::TRRSkippedReason aReason,
185 TRR* aTRRRequest) {
186 if (rec != mRecord) {
187 LOG(("TRRQuery::CompleteLookup - Pushed record. Go to resolver"))do { const ::mozilla::LogModule* moz_real_module = mozilla::net
::gHostResolverLog; if ((__builtin_expect(!!(mozilla::detail::
log_test(moz_real_module, mozilla::LogLevel::Debug)), 0))) { mozilla
::detail::log_print(moz_real_module, mozilla::LogLevel::Debug
, "TRRQuery::CompleteLookup - Pushed record. Go to resolver")
; } } while (0);
188 return mHostResolver->CompleteLookup(rec, status, aNewRRSet, pb,
189 aOriginsuffix, aReason, aTRRRequest);
190 }
191
192 LOG(("TRRQuery::CompleteLookup > host: %s", rec->host.get()))do { const ::mozilla::LogModule* moz_real_module = mozilla::net
::gHostResolverLog; if ((__builtin_expect(!!(mozilla::detail::
log_test(moz_real_module, mozilla::LogLevel::Debug)), 0))) { mozilla
::detail::log_print(moz_real_module, mozilla::LogLevel::Debug
, "TRRQuery::CompleteLookup > host: %s", rec->host.get(
)); } } while (0);
193
194 RefPtr<AddrInfo> newRRSet(aNewRRSet);
195 DNSResolverType resolverType = newRRSet->ResolverType();
196 {
197 MutexAutoLock trrlock(mTrrLock);
198 if (newRRSet->TRRType() == TRRTYPE_A) {
199 MOZ_ASSERT(mTrrA)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mTrrA)>::isValid, "invalid assertion condition");
if ((__builtin_expect(!!(!(!!(mTrrA))), 0))) { do { } while (
false); MOZ_ReportAssertionFailure("mTrrA", "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp"
, 199); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mTrrA" ")");
do { *((volatile int*)__null) = 199; __attribute__((nomerge)
) ::abort(); } while (false); } } while (false);
200 mTRRAFailReason = aReason;
201 mTrrA = nullptr;
202 mTrrAUsed = NS_SUCCEEDED(status)((bool)(__builtin_expect(!!(!NS_FAILED_impl(status)), 1))) ? OK : FAILED;
203 MOZ_ASSERT(!mAddrInfoA)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(!mAddrInfoA)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(!mAddrInfoA))), 0))) { do { }
while (false); MOZ_ReportAssertionFailure("!mAddrInfoA", "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp"
, 203); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!mAddrInfoA"
")"); do { *((volatile int*)__null) = 203; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
204 mAddrInfoA = newRRSet;
205 mAResult = status;
206 LOG(("A query status: 0x%x", static_cast<uint32_t>(status)))do { const ::mozilla::LogModule* moz_real_module = mozilla::net
::gHostResolverLog; if ((__builtin_expect(!!(mozilla::detail::
log_test(moz_real_module, mozilla::LogLevel::Debug)), 0))) { mozilla
::detail::log_print(moz_real_module, mozilla::LogLevel::Debug
, "A query status: 0x%x", static_cast<uint32_t>(status)
); } } while (0);
207 } else if (newRRSet->TRRType() == TRRTYPE_AAAA) {
208 MOZ_ASSERT(mTrrAAAA)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mTrrAAAA)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mTrrAAAA))), 0))) { do { } while
(false); MOZ_ReportAssertionFailure("mTrrAAAA", "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp"
, 208); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mTrrAAAA" ")"
); do { *((volatile int*)__null) = 208; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
209 mTRRAAAAFailReason = aReason;
210 mTrrAAAA = nullptr;
211 mTrrAAAAUsed = NS_SUCCEEDED(status)((bool)(__builtin_expect(!!(!NS_FAILED_impl(status)), 1))) ? OK : FAILED;
212 MOZ_ASSERT(!mAddrInfoAAAA)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(!mAddrInfoAAAA)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(!mAddrInfoAAAA))), 0))) { do
{ } while (false); MOZ_ReportAssertionFailure("!mAddrInfoAAAA"
, "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp"
, 212); AnnotateMozCrashReason("MOZ_ASSERT" "(" "!mAddrInfoAAAA"
")"); do { *((volatile int*)__null) = 212; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
213 mAddrInfoAAAA = newRRSet;
214 mAAAAResult = status;
215 LOG(("AAAA query status: 0x%x", static_cast<uint32_t>(status)))do { const ::mozilla::LogModule* moz_real_module = mozilla::net
::gHostResolverLog; if ((__builtin_expect(!!(mozilla::detail::
log_test(moz_real_module, mozilla::LogLevel::Debug)), 0))) { mozilla
::detail::log_print(moz_real_module, mozilla::LogLevel::Debug
, "AAAA query status: 0x%x", static_cast<uint32_t>(status
)); } } while (0);
216 } else {
217 MOZ_ASSERT(0)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(0)>::isValid, "invalid assertion condition"); if (
(__builtin_expect(!!(!(!!(0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure
("0", "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp"
, 217); AnnotateMozCrashReason("MOZ_ASSERT" "(" "0" ")"); do {
*((volatile int*)__null) = 217; __attribute__((nomerge)) ::abort
(); } while (false); } } while (false);
218 }
219 }
220
221 if (NS_SUCCEEDED(status)((bool)(__builtin_expect(!!(!NS_FAILED_impl(status)), 1)))) {
222 mTRRSuccess++;
223 if (mTRRSuccess == 1) {
224 // Store the duration on first succesful TRR response. We
225 // don't know that there will be a second response nor can we
226 // tell which of two has useful data.
227 mTrrDuration = TimeStamp::Now() - mTrrStart;
228 }
229 }
230
231 bool pendingRequest = false;
232 if (mTRRRequestCounter) {
233 mTRRRequestCounter--;
234 pendingRequest = (mTRRRequestCounter != 0);
235 } else {
236 MOZ_DIAGNOSTIC_ASSERT(false, "Request counter is messed up")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(false)>::isValid, "invalid assertion condition");
if ((__builtin_expect(!!(!(!!(false))), 0))) { do { } while (
false); MOZ_ReportAssertionFailure("false" " (" "Request counter is messed up"
")", "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp"
, 236); AnnotateMozCrashReason("MOZ_DIAGNOSTIC_ASSERT" "(" "false"
") (" "Request counter is messed up" ")"); do { *((volatile int
*)__null) = 236; __attribute__((nomerge)) ::abort(); } while (
false); } } while (false);
237 }
238 if (pendingRequest) { // There are other outstanding requests
239 LOG(("CompleteLookup: waiting for all responses!\n"))do { const ::mozilla::LogModule* moz_real_module = mozilla::net
::gHostResolverLog; if ((__builtin_expect(!!(mozilla::detail::
log_test(moz_real_module, mozilla::LogLevel::Debug)), 0))) { mozilla
::detail::log_print(moz_real_module, mozilla::LogLevel::Debug
, "CompleteLookup: waiting for all responses!\n"); } } while (
0);
240 return LOOKUP_OK;
241 }
242
243 if (mRecord->af == AF_UNSPEC0) {
244 // merge successful records
245 if (mTrrAUsed == OK) {
246 LOG(("Have A response"))do { const ::mozilla::LogModule* moz_real_module = mozilla::net
::gHostResolverLog; if ((__builtin_expect(!!(mozilla::detail::
log_test(moz_real_module, mozilla::LogLevel::Debug)), 0))) { mozilla
::detail::log_print(moz_real_module, mozilla::LogLevel::Debug
, "Have A response"); } } while (0);
247 newRRSet = mAddrInfoA;
248 status = mAResult;
249 if (mTrrAAAAUsed == OK) {
250 LOG(("Merging A and AAAA responses"))do { const ::mozilla::LogModule* moz_real_module = mozilla::net
::gHostResolverLog; if ((__builtin_expect(!!(mozilla::detail::
log_test(moz_real_module, mozilla::LogLevel::Debug)), 0))) { mozilla
::detail::log_print(moz_real_module, mozilla::LogLevel::Debug
, "Merging A and AAAA responses"); } } while (0);
251 newRRSet = merge_rrset(newRRSet, mAddrInfoAAAA);
252 }
253 } else {
254 newRRSet = mAddrInfoAAAA;
255 status = mAAAAResult;
256 }
257
258 if (NS_FAILED(status)((bool)(__builtin_expect(!!(NS_FAILED_impl(status)), 0))) && (mAAAAResult == NS_ERROR_DEFINITIVE_UNKNOWN_HOST ||
259 mAResult == NS_ERROR_DEFINITIVE_UNKNOWN_HOST)) {
260 status = NS_ERROR_DEFINITIVE_UNKNOWN_HOST;
261 }
262 } else {
263 // If this is a failed AAAA request, but the server only has a A record,
264 // then we should not fallback to Do53. Instead we also send a A request
265 // and return NS_ERROR_DEFINITIVE_UNKNOWN_HOST if that succeeds.
266 if (NS_FAILED(status)((bool)(__builtin_expect(!!(NS_FAILED_impl(status)), 0))) && status != NS_ERROR_DEFINITIVE_UNKNOWN_HOST &&
267 (mTrrAUsed == INIT || mTrrAAAAUsed == INIT)) {
268 if (newRRSet->TRRType() == TRRTYPE_A) {
269 LOG(("A lookup failed. Checking if AAAA record exists"))do { const ::mozilla::LogModule* moz_real_module = mozilla::net
::gHostResolverLog; if ((__builtin_expect(!!(mozilla::detail::
log_test(moz_real_module, mozilla::LogLevel::Debug)), 0))) { mozilla
::detail::log_print(moz_real_module, mozilla::LogLevel::Debug
, "A lookup failed. Checking if AAAA record exists"); } } while
(0);
270 nsTArray<RefPtr<TRR>> requestsToSend;
271 PrepareQuery(TRRTYPE_AAAA, requestsToSend);
272 if (SendQueries(requestsToSend)) {
273 LOG(("Sent AAAA request"))do { const ::mozilla::LogModule* moz_real_module = mozilla::net
::gHostResolverLog; if ((__builtin_expect(!!(mozilla::detail::
log_test(moz_real_module, mozilla::LogLevel::Debug)), 0))) { mozilla
::detail::log_print(moz_real_module, mozilla::LogLevel::Debug
, "Sent AAAA request"); } } while (0);
274 return LOOKUP_OK;
275 }
276 } else if (newRRSet->TRRType() == TRRTYPE_AAAA) {
277 LOG(("AAAA lookup failed. Checking if A record exists"))do { const ::mozilla::LogModule* moz_real_module = mozilla::net
::gHostResolverLog; if ((__builtin_expect(!!(mozilla::detail::
log_test(moz_real_module, mozilla::LogLevel::Debug)), 0))) { mozilla
::detail::log_print(moz_real_module, mozilla::LogLevel::Debug
, "AAAA lookup failed. Checking if A record exists"); } } while
(0);
278 nsTArray<RefPtr<TRR>> requestsToSend;
279 PrepareQuery(TRRTYPE_A, requestsToSend);
280 if (SendQueries(requestsToSend)) {
281 LOG(("Sent A request"))do { const ::mozilla::LogModule* moz_real_module = mozilla::net
::gHostResolverLog; if ((__builtin_expect(!!(mozilla::detail::
log_test(moz_real_module, mozilla::LogLevel::Debug)), 0))) { mozilla
::detail::log_print(moz_real_module, mozilla::LogLevel::Debug
, "Sent A request"); } } while (0);
282 return LOOKUP_OK;
283 }
284 } else {
285 MOZ_ASSERT(false, "Unexpected family")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(false)>::isValid, "invalid assertion condition");
if ((__builtin_expect(!!(!(!!(false))), 0))) { do { } while (
false); MOZ_ReportAssertionFailure("false" " (" "Unexpected family"
")", "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp"
, 285); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") ("
"Unexpected family" ")"); do { *((volatile int*)__null) = 285
; __attribute__((nomerge)) ::abort(); } while (false); } } while
(false);
286 }
287 }
288 bool otherSucceeded =
289 mRecord->af == AF_INET610 ? mTrrAUsed == OK : mTrrAAAAUsed == OK;
290 LOG(("TRRQuery::CompleteLookup other request succeeded"))do { const ::mozilla::LogModule* moz_real_module = mozilla::net
::gHostResolverLog; if ((__builtin_expect(!!(mozilla::detail::
log_test(moz_real_module, mozilla::LogLevel::Debug)), 0))) { mozilla
::detail::log_print(moz_real_module, mozilla::LogLevel::Debug
, "TRRQuery::CompleteLookup other request succeeded"); } } while
(0);
291
292 if (mRecord->af == AF_INET2) {
293 // return only A record
294 newRRSet = mAddrInfoA;
295 status = mAResult;
296 if (NS_FAILED(status)((bool)(__builtin_expect(!!(NS_FAILED_impl(status)), 0))) &&
297 (otherSucceeded || mAAAAResult == NS_ERROR_DEFINITIVE_UNKNOWN_HOST)) {
298 LOG(("status set to NS_ERROR_DEFINITIVE_UNKNOWN_HOST"))do { const ::mozilla::LogModule* moz_real_module = mozilla::net
::gHostResolverLog; if ((__builtin_expect(!!(mozilla::detail::
log_test(moz_real_module, mozilla::LogLevel::Debug)), 0))) { mozilla
::detail::log_print(moz_real_module, mozilla::LogLevel::Debug
, "status set to NS_ERROR_DEFINITIVE_UNKNOWN_HOST"); } } while
(0);
299 status = NS_ERROR_DEFINITIVE_UNKNOWN_HOST;
300 }
301
302 } else if (mRecord->af == AF_INET610) {
303 // return only AAAA record
304 newRRSet = mAddrInfoAAAA;
305 status = mAAAAResult;
306
307 if (NS_FAILED(status)((bool)(__builtin_expect(!!(NS_FAILED_impl(status)), 0))) &&
308 (otherSucceeded || mAResult == NS_ERROR_DEFINITIVE_UNKNOWN_HOST)) {
309 LOG(("status set to NS_ERROR_DEFINITIVE_UNKNOWN_HOST"))do { const ::mozilla::LogModule* moz_real_module = mozilla::net
::gHostResolverLog; if ((__builtin_expect(!!(mozilla::detail::
log_test(moz_real_module, mozilla::LogLevel::Debug)), 0))) { mozilla
::detail::log_print(moz_real_module, mozilla::LogLevel::Debug
, "status set to NS_ERROR_DEFINITIVE_UNKNOWN_HOST"); } } while
(0);
310 status = NS_ERROR_DEFINITIVE_UNKNOWN_HOST;
311 }
312
313 } else {
314 MOZ_ASSERT(false, "Unexpected AF")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(false)>::isValid, "invalid assertion condition");
if ((__builtin_expect(!!(!(!!(false))), 0))) { do { } while (
false); MOZ_ReportAssertionFailure("false" " (" "Unexpected AF"
")", "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp"
, 314); AnnotateMozCrashReason("MOZ_ASSERT" "(" "false" ") ("
"Unexpected AF" ")"); do { *((volatile int*)__null) = 314; __attribute__
((nomerge)) ::abort(); } while (false); } } while (false);
315 return LOOKUP_OK;
316 }
317
318 // If this record failed, but there is a record for the other AF
319 // we prevent fallback to the native resolver.
320 }
321
322 if (mTRRSuccess && mHostResolver->GetNCS() &&
323 (mHostResolver->GetNCS()->GetNAT64() ==
324 nsINetworkConnectivityService::OK) &&
325 newRRSet) {
326 newRRSet = mHostResolver->GetNCS()->MapNAT64IPs(newRRSet);
327 }
328
329 if (resolverType == DNSResolverType::TRR) {
330 if (mTrrAUsed == OK) {
331 AccumulateCategoricalKeyed(
332 TRRService::ProviderKey(),
333 Telemetry::LABELS_DNS_LOOKUP_DISPOSITION3::trrAOK);
334 } else if (mTrrAUsed == FAILED) {
335 AccumulateCategoricalKeyed(
336 TRRService::ProviderKey(),
337 Telemetry::LABELS_DNS_LOOKUP_DISPOSITION3::trrAFail);
338 }
339
340 if (mTrrAAAAUsed == OK) {
341 AccumulateCategoricalKeyed(
342 TRRService::ProviderKey(),
343 Telemetry::LABELS_DNS_LOOKUP_DISPOSITION3::trrAAAAOK);
344 } else if (mTrrAAAAUsed == FAILED) {
345 AccumulateCategoricalKeyed(
346 TRRService::ProviderKey(),
347 Telemetry::LABELS_DNS_LOOKUP_DISPOSITION3::trrAAAAFail);
348 }
349 }
350
351 mAddrInfoAAAA = nullptr;
352 mAddrInfoA = nullptr;
353
354 MOZ_DIAGNOSTIC_ASSERT(!mCalledCompleteLookup,do { static_assert( mozilla::detail::AssertionConditionType<
decltype(!mCalledCompleteLookup)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(!mCalledCompleteLookup))), 0
))) { do { } while (false); MOZ_ReportAssertionFailure("!mCalledCompleteLookup"
" (" "must not call CompleteLookup more than once" ")", "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp"
, 355); AnnotateMozCrashReason("MOZ_DIAGNOSTIC_ASSERT" "(" "!mCalledCompleteLookup"
") (" "must not call CompleteLookup more than once" ")"); do
{ *((volatile int*)__null) = 355; __attribute__((nomerge)) ::
abort(); } while (false); } } while (false)
355 "must not call CompleteLookup more than once")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(!mCalledCompleteLookup)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(!mCalledCompleteLookup))), 0
))) { do { } while (false); MOZ_ReportAssertionFailure("!mCalledCompleteLookup"
" (" "must not call CompleteLookup more than once" ")", "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp"
, 355); AnnotateMozCrashReason("MOZ_DIAGNOSTIC_ASSERT" "(" "!mCalledCompleteLookup"
") (" "must not call CompleteLookup more than once" ")"); do
{ *((volatile int*)__null) = 355; __attribute__((nomerge)) ::
abort(); } while (false); } } while (false);
356 mCalledCompleteLookup = true;
357 return mHostResolver->CompleteLookup(rec, status, newRRSet, pb, aOriginsuffix,
358 aReason, aTRRRequest);
359}
360
361AHostResolver::LookupStatus TRRQuery::CompleteLookupByType(
362 nsHostRecord* rec, nsresult status,
363 mozilla::net::TypeRecordResultType& aResult,
364 mozilla::net::TRRSkippedReason aReason, uint32_t aTtl, bool pb) {
365 if (rec != mRecord) {
366 LOG(("TRRQuery::CompleteLookup - Pushed record. Go to resolver"))do { const ::mozilla::LogModule* moz_real_module = mozilla::net
::gHostResolverLog; if ((__builtin_expect(!!(mozilla::detail::
log_test(moz_real_module, mozilla::LogLevel::Debug)), 0))) { mozilla
::detail::log_print(moz_real_module, mozilla::LogLevel::Debug
, "TRRQuery::CompleteLookup - Pushed record. Go to resolver")
; } } while (0);
367 return mHostResolver->CompleteLookupByType(rec, status, aResult, aReason,
368 aTtl, pb);
369 }
370
371 {
372 MutexAutoLock trrlock(mTrrLock);
373 mTrrByType = nullptr;
374 }
375
376 // Unlike the address record, we store the duration regardless of the status.
377 mTrrDuration = TimeStamp::Now() - mTrrStart;
378
379 MOZ_DIAGNOSTIC_ASSERT(!mCalledCompleteLookup,do { static_assert( mozilla::detail::AssertionConditionType<
decltype(!mCalledCompleteLookup)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(!mCalledCompleteLookup))), 0
))) { do { } while (false); MOZ_ReportAssertionFailure("!mCalledCompleteLookup"
" (" "must not call CompleteLookup more than once" ")", "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp"
, 380); AnnotateMozCrashReason("MOZ_DIAGNOSTIC_ASSERT" "(" "!mCalledCompleteLookup"
") (" "must not call CompleteLookup more than once" ")"); do
{ *((volatile int*)__null) = 380; __attribute__((nomerge)) ::
abort(); } while (false); } } while (false)
380 "must not call CompleteLookup more than once")do { static_assert( mozilla::detail::AssertionConditionType<
decltype(!mCalledCompleteLookup)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(!mCalledCompleteLookup))), 0
))) { do { } while (false); MOZ_ReportAssertionFailure("!mCalledCompleteLookup"
" (" "must not call CompleteLookup more than once" ")", "/var/lib/jenkins/workspace/firefox-scan-build/netwerk/dns/TRRQuery.cpp"
, 380); AnnotateMozCrashReason("MOZ_DIAGNOSTIC_ASSERT" "(" "!mCalledCompleteLookup"
") (" "must not call CompleteLookup more than once" ")"); do
{ *((volatile int*)__null) = 380; __attribute__((nomerge)) ::
abort(); } while (false); } } while (false);
381 mCalledCompleteLookup = true;
382 return mHostResolver->CompleteLookupByType(rec, status, aResult, aReason,
383 aTtl, pb);
384}
385
386} // namespace net
387} // namespace mozilla