Bug Summary

File:pr/Linux4.19_x86_64_gcc_glibc_PTH_64_DBG.OBJ/pr/tests/../../../pr/tests/ipv6.c
Warning:line 178, column 17
Value stored to 'failed' 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 ipv6.c -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -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 -fmath-errno -ffp-contract=on -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/nss-scan-build/nspr/Linux4.19_x86_64_gcc_glibc_PTH_64_DBG.OBJ/pr/tests -fcoverage-compilation-dir=/var/lib/jenkins/workspace/nss-scan-build/nspr/Linux4.19_x86_64_gcc_glibc_PTH_64_DBG.OBJ/pr/tests -resource-dir /usr/lib/llvm-18/lib/clang/18 -U NDEBUG -D DEBUG_jenkins -D PACKAGE_NAME="" -D PACKAGE_TARNAME="" -D PACKAGE_VERSION="" -D PACKAGE_STRING="" -D PACKAGE_BUGREPORT="" -D PACKAGE_URL="" -D DEBUG=1 -D HAVE_VISIBILITY_HIDDEN_ATTRIBUTE=1 -D HAVE_VISIBILITY_PRAGMA=1 -D XP_UNIX=1 -D _GNU_SOURCE=1 -D HAVE_FCNTL_FILE_LOCKING=1 -D HAVE_POINTER_LOCALTIME_R=1 -D LINUX=1 -D HAVE_DLADDR=1 -D HAVE_GETTID=1 -D HAVE_LCHOWN=1 -D HAVE_SETPRIORITY=1 -D HAVE_STRERROR=1 -D HAVE_SYSCALL=1 -D HAVE_SECURE_GETENV=1 -D _REENTRANT=1 -D FORCE_PR_LOG -D _PR_PTHREADS -U HAVE_CVAR_BUILT_ON_SEM -I /var/lib/jenkins/workspace/nss-scan-build/nss/../dist/Linux4.19_x86_64_gcc_glibc_PTH_64_DBG.OBJ/include -I ../../../pr/include -I ../../../pr/include/private -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 -ferror-limit 19 -fvisibility=hidden -fgnuc-version=4.2.1 -fno-inline -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2024-05-18-082241-28900-1 -x c ../../../pr/tests/ipv6.c
1/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2/* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5
6#include "prio.h"
7#include "prenv.h"
8#include "prmem.h"
9#include "prlink.h"
10#include "prsystem.h"
11#include "prnetdb.h"
12#include "prprf.h"
13#include "prvrsion.h"
14
15#include "plerror.h"
16#include "plgetopt.h"
17#include "obsolete/probslet.h"
18
19#include <string.h>
20
21#define DNS_BUFFER100 100
22#define ADDR_BUFFER100 100
23#define HOST_BUFFER1024 1024
24#define PROTO_BUFFER1500 1500
25
26#define NETADDR_SIZE(addr)(2 == (addr)->raw.family ? sizeof((addr)->inet) : sizeof
((addr)->ipv6)) \
27 (PR_AF_INET2 == (addr)->raw.family ? \
28 sizeof((addr)->inet) : sizeof((addr)->ipv6))
29
30static PRFileDesc *err = NULL((void*)0);
31
32static void Help(void)
33{
34 PR_fprintf(err, "Usage: [-V] [-h]\n");
35 PR_fprintf(err, "\t<nul> Name of host to lookup (default: self)\n");
36 PR_fprintf(err, "\t-V Display runtime version info (default: FALSE)\n");
37 PR_fprintf(err, "\t-h This message and nothing else\n");
38} /* Help */
39
40static void DumpAddr(const PRNetAddr* address, const char *msg)
41{
42 PRUint32 *word = (PRUint32*)address;
43 PRUint32 addr_len = sizeof(PRNetAddr);
44 PR_fprintf(err, "%s[%d]\t", msg, NETADDR_SIZE(address)(2 == (address)->raw.family ? sizeof((address)->inet) :
sizeof((address)->ipv6)));
45 while (addr_len > 0)
46 {
47 PR_fprintf(err, " %08x", *word++);
48 addr_len -= sizeof(PRUint32);
49 }
50 PR_fprintf(err, "\n");
51} /* DumpAddr */
52
53static PRStatus PrintAddress(const PRNetAddr* address)
54{
55 PRNetAddr translation;
56 char buffer[ADDR_BUFFER100];
57 PRStatus rv = PR_NetAddrToString(address, buffer, sizeof(buffer));
58 if (PR_FAILURE == rv) {
59 PL_FPrintError(err, "PR_NetAddrToString");
60 }
61 else
62 {
63 PR_fprintf(err, "\t%s\n", buffer);
64 memset(&translation, 0, sizeof(translation));
65 rv = PR_StringToNetAddr(buffer, &translation);
66 if (PR_FAILURE == rv) {
67 PL_FPrintError(err, "PR_StringToNetAddr");
68 }
69 else
70 {
71 PRSize addr_len = NETADDR_SIZE(address)(2 == (address)->raw.family ? sizeof((address)->inet) :
sizeof((address)->ipv6));
72 if (0 != memcmp(address, &translation, addr_len))
73 {
74 PR_fprintf(err, "Address translations do not match\n");
75 DumpAddr(address, "original");
76 DumpAddr(&translation, "translate");
77 rv = PR_FAILURE;
78 }
79 }
80 }
81 return rv;
82} /* PrintAddress */
83
84int main(int argc, char **argv)
85{
86 PRStatus rv;
87 PLOptStatus os;
88 PRHostEnt host;
89 PRProtoEnt proto;
90 const char *name = NULL((void*)0);
91 PRBool failed = PR_FALSE0, version = PR_FALSE0;
92 PLOptState *opt = PL_CreateOptState(argc, argv, "Vh");
93
94 err = PR_GetSpecialFD(PR_StandardError);
95
96 while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
97 {
98 if (PL_OPT_BAD == os) {
99 continue;
100 }
101 switch (opt->option)
102 {
103 case 0: /* Name of host to lookup */
104 name = opt->value;
105 break;
106 case 'V': /* Do version discovery */
107 version = PR_TRUE1;
108 break;
109 case 'h': /* user wants some guidance */
110 default:
111 Help(); /* so give him an earful */
112 return 2; /* but not a lot else */
113 }
114 }
115 PL_DestroyOptState(opt);
116
117 if (version)
118 {
119#if defined(WINNT)
120#define NSPR_LIB"nspr4" "libnspr4"
121#else
122#define NSPR_LIB"nspr4" "nspr4"
123#endif
124 const PRVersionDescription *version_info;
125 char *nspr_path = PR_GetEnv("LD_LIBRARY_PATH");
126 char *nspr_name = PR_GetLibraryName(nspr_path, NSPR_LIB"nspr4");
127 PRLibrary *runtime = PR_LoadLibrary(nspr_name);
128 if (NULL((void*)0) == runtime) {
129 PL_FPrintError(err, "PR_LoadLibrary");
130 }
131 else
132 {
133 versionEntryPointType versionPoint = (versionEntryPointType)
134 PR_FindSymbol(runtime, "libVersionPoint");
135 if (NULL((void*)0) == versionPoint) {
136 PL_FPrintError(err, "PR_FindSymbol");
137 }
138 else
139 {
140 char buffer[100];
141 PRExplodedTime exploded;
142 version_info = versionPoint();
143 (void)PR_fprintf(err, "Runtime library version information\n");
144 PR_ExplodeTime(
145 version_info->buildTime, PR_GMTParameters, &exploded);
146 (void)PR_FormatTime(
147 buffer, sizeof(buffer), "%d %b %Y %H:%M:%S", &exploded);
148 (void)PR_fprintf(err, " Build time: %s GMT\n", buffer);
149 (void)PR_fprintf(
150 err, " Build time: %s\n", version_info->buildTimeString);
151 (void)PR_fprintf(
152 err, " %s V%u.%u.%u (%s%s%s)\n",
153 version_info->description,
154 version_info->vMajor,
155 version_info->vMinor,
156 version_info->vPatch,
157 (version_info->beta ? " beta " : ""),
158 (version_info->debug ? " debug " : ""),
159 (version_info->special ? " special" : ""));
160 (void)PR_fprintf(err, " filename: %s\n", version_info->filename);
161 (void)PR_fprintf(err, " security: %s\n", version_info->security);
162 (void)PR_fprintf(err, " copyright: %s\n", version_info->copyright);
163 (void)PR_fprintf(err, " comment: %s\n", version_info->comment);
164 }
165 }
166 if (NULL((void*)0) != nspr_name) {
167 PR_FreeLibraryName(nspr_name);
168 }
169 }
170
171 {
172 if (NULL((void*)0) == name)
173 {
174 char *me = (char*)PR_MALLOC(DNS_BUFFER)(PR_Malloc((100)));
175 rv = PR_GetSystemInfo(PR_SI_HOSTNAME, me, DNS_BUFFER100);
176 if (PR_FAILURE == rv)
177 {
178 failed = PR_TRUE1;
Value stored to 'failed' is never read
179 PL_FPrintError(err, "PR_GetSystemInfo");
180 return 2;
181 }
182 name = me; /* just leak the storage */
183 }
184 }
185
186 {
187 char buffer[HOST_BUFFER1024];
188 PR_fprintf(err, "Translating the name %s ...", name);
189
190 rv = PR_GetHostByName(name, buffer, sizeof(buffer), &host);
191 if (PR_FAILURE == rv)
192 {
193 failed = PR_TRUE1;
194 PL_FPrintError(err, "PR_GetHostByName");
195 }
196 else
197 {
198 PRIntn index = 0;
199 PRNetAddr address;
200 memset(&address, 0, sizeof(PRNetAddr));
201 PR_fprintf(err, "success .. enumerating results\n");
202 do
203 {
204 index = PR_EnumerateHostEnt(index, &host, 0, &address);
205 if (index > 0) {
206 PrintAddress(&address);
207 }
208 else if (-1 == index)
209 {
210 failed = PR_TRUE1;
211 PL_FPrintError(err, "PR_EnumerateHostEnt");
212 }
213 } while (index > 0);
214 }
215 }
216
217
218 {
219 char buffer[PROTO_BUFFER1500];
220 /*
221 ** Get Proto by name/number
222 */
223 rv = PR_GetProtoByName("tcp", &buffer[1], sizeof(buffer) - 1, &proto);
224 rv = PR_GetProtoByNumber(6, &buffer[3], sizeof(buffer) - 3, &proto);
225 }
226
227 return (failed) ? 1 : 0;
228}