1 | /* -*- Mode: C; tab-width: 4 -*- |
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2 | * |
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3 | * Copyright (c) 2015 Apple Inc. All rights reserved. |
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4 | * |
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5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
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6 | * you may not use this file except in compliance with the License. |
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7 | * You may obtain a copy of the License at |
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8 | * |
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9 | * http://www.apache.org/licenses/LICENSE-2.0 |
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10 | * |
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11 | * Unless required by applicable law or agreed to in writing, software |
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12 | * distributed under the License is distributed on an "AS IS" BASIS, |
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13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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14 | * See the License for the specific language governing permissions and |
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15 | * limitations under the License. |
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16 | */ |
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17 | |
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18 | #include "mDNSEmbeddedAPI.h" |
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19 | |
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20 | #include <arpa/inet.h> |
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21 | #include <dlfcn.h> |
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22 | #include <stddef.h> |
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23 | #include <stdint.h> |
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24 | #include <sys/socket.h> |
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25 | #include <Symptoms/SymptomReporter.h> |
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26 | |
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27 | #define SYMPTOM_REPORTER_mDNSResponder_NUMERIC_ID 101 |
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28 | #define SYMPTOM_REPORTER_mDNSResponder_TEXT_ID "com.apple.mDNSResponder" |
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29 | |
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30 | #define SYMPTOM_DNS_NO_REPLIES 0x00065001 |
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31 | #define SYMPTOM_DNS_RESUMED_RESPONDING 0x00065002 |
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32 | |
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33 | static symptom_framework_t symptomReporter; |
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34 | static symptom_framework_t (*symptom_framework_init_f)(symptom_ident_t id, const char *originator_string) = mDNSNULL; |
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35 | static symptom_t (*symptom_new_f)(symptom_framework_t framework, symptom_ident_t id) = mDNSNULL; |
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36 | static int (*symptom_set_additional_qualifier_f)(symptom_t symptom, uint32_t qualifier_type, size_t qualifier_len, void *qualifier_data) = mDNSNULL; |
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37 | static int (*symptom_send_f)(symptom_t symptom) = mDNSNULL; |
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38 | |
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39 | mDNSlocal mStatus SymptomReporterInitCheck(void) |
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40 | { |
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41 | mStatus err; |
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42 | static mDNSBool isInitialized = mDNSfalse; |
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43 | static void *symptomReporterLib = mDNSNULL; |
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44 | static const char path[] = "/System/Library/PrivateFrameworks/Symptoms.framework/Frameworks/SymptomReporter.framework/SymptomReporter"; |
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45 | |
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46 | if (!isInitialized) |
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47 | { |
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48 | if (!symptomReporterLib) |
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49 | { |
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50 | symptomReporterLib = dlopen(path, RTLD_LAZY | RTLD_LOCAL); |
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51 | if (!symptomReporterLib) |
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52 | goto exit; |
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53 | } |
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54 | |
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55 | if (!symptom_framework_init_f) |
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56 | { |
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57 | symptom_framework_init_f = dlsym(symptomReporterLib, "symptom_framework_init"); |
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58 | if (!symptom_framework_init_f) |
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59 | goto exit; |
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60 | } |
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61 | |
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62 | if (!symptom_new_f) |
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63 | { |
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64 | symptom_new_f = dlsym(symptomReporterLib, "symptom_new"); |
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65 | if (!symptom_new_f) |
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66 | goto exit; |
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67 | } |
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68 | |
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69 | if (!symptom_set_additional_qualifier_f) |
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70 | { |
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71 | symptom_set_additional_qualifier_f = dlsym(symptomReporterLib, "symptom_set_additional_qualifier"); |
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72 | if (!symptom_set_additional_qualifier_f) |
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73 | goto exit; |
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74 | } |
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75 | |
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76 | if (!symptom_send_f) |
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77 | { |
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78 | symptom_send_f = dlsym(symptomReporterLib, "symptom_send"); |
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79 | if (!symptom_send_f) |
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80 | goto exit; |
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81 | } |
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82 | |
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83 | symptomReporter = symptom_framework_init_f(SYMPTOM_REPORTER_mDNSResponder_NUMERIC_ID, SYMPTOM_REPORTER_mDNSResponder_TEXT_ID); |
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84 | isInitialized = mDNStrue; |
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85 | } |
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86 | |
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87 | exit: |
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88 | err = isInitialized ? mStatus_NoError : mStatus_NotInitializedErr; |
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89 | return err; |
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90 | } |
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91 | |
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92 | mDNSlocal mStatus SymptomReporterReportDNSReachability(const mDNSAddr *addr, mDNSBool isReachable) |
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93 | { |
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94 | mStatus err; |
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95 | symptom_t symptom; |
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96 | struct sockaddr_storage sockAddr; |
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97 | size_t sockAddrSize; |
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98 | |
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99 | LogInfo("SymptomReporterReportDNSReachability: DNS server %#a is %sreachable", addr, isReachable ? "" : "un"); |
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100 | |
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101 | if (addr->type == mDNSAddrType_IPv4) |
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102 | { |
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103 | struct sockaddr_in *sin = (struct sockaddr_in *)&sockAddr; |
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104 | sockAddrSize = sizeof(*sin); |
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105 | mDNSPlatformMemZero(sin, sockAddrSize); |
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106 | sin->sin_len = sockAddrSize; |
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107 | sin->sin_family = AF_INET; |
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108 | sin->sin_addr.s_addr = addr->ip.v4.NotAnInteger; |
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109 | } |
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110 | else if (addr->type == mDNSAddrType_IPv6) |
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111 | { |
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112 | struct sockaddr_in6* sin6 = (struct sockaddr_in6*)&sockAddr; |
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113 | sockAddrSize = sizeof(*sin6); |
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114 | mDNSPlatformMemZero(sin6, sockAddrSize); |
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115 | sin6->sin6_len = sockAddrSize; |
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116 | sin6->sin6_family = AF_INET6; |
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117 | sin6->sin6_addr = *(struct in6_addr *)&addr->ip.v6; |
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118 | } |
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119 | else |
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120 | { |
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121 | LogMsg("SymptomReporterReportDNSReachability: addr is not an IPv4 or IPv6 address!"); |
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122 | err = mStatus_BadParamErr; |
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123 | goto exit; |
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124 | } |
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125 | |
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126 | symptom = symptom_new_f(symptomReporter, isReachable ? SYMPTOM_DNS_RESUMED_RESPONDING : SYMPTOM_DNS_NO_REPLIES); |
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127 | symptom_set_additional_qualifier_f(symptom, 1, sockAddrSize, (void *)&sockAddr); |
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128 | symptom_send_f(symptom); |
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129 | err = mStatus_NoError; |
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130 | |
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131 | exit: |
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132 | return err; |
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133 | } |
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134 | |
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135 | mDNSexport mStatus SymptomReporterDNSServerReachable(mDNS *const m, const mDNSAddr *addr) |
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136 | { |
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137 | mStatus err; |
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138 | DNSServer *s; |
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139 | mDNSBool found = mDNSfalse; |
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140 | |
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141 | err = SymptomReporterInitCheck(); |
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142 | if (err != mStatus_NoError) |
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143 | goto exit; |
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144 | |
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145 | for (s = m->DNSServers; s; s = s->next) |
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146 | { |
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147 | if (s->flags & DNSServer_FlagDelete) |
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148 | continue; |
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149 | if ((s->flags & DNSServer_FlagUnreachable) && mDNSSameAddress(addr, &s->addr)) |
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150 | { |
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151 | s->flags &= ~DNSServer_FlagUnreachable; |
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152 | NumUnreachableDNSServers--; |
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153 | found = mDNStrue; |
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154 | } |
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155 | } |
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156 | |
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157 | if (!found) |
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158 | { |
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159 | err = mStatus_NoSuchNameErr; |
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160 | goto exit; |
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161 | } |
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162 | |
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163 | err = SymptomReporterReportDNSReachability(addr, mDNStrue); |
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164 | |
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165 | exit: |
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166 | return err; |
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167 | } |
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168 | |
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169 | mDNSexport mStatus SymptomReporterDNSServerUnreachable(DNSServer *s) |
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170 | { |
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171 | mStatus err; |
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172 | |
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173 | err = SymptomReporterInitCheck(); |
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174 | if (err != mStatus_NoError) |
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175 | goto exit; |
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176 | |
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177 | if ((s->flags & DNSServer_FlagDelete) || (s->flags & DNSServer_FlagUnreachable)) |
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178 | goto exit; |
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179 | |
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180 | s->flags |= DNSServer_FlagUnreachable; |
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181 | NumUnreachableDNSServers++; |
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182 | |
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183 | err = SymptomReporterReportDNSReachability(&s->addr, mDNSfalse); |
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184 | |
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185 | exit: |
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186 | return err; |
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187 | } |
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