Skip res_doh_send() if there is no validated DoH servers

Since res_doh_send() can take around 2 milliseconds, skip calling
it when there is no DoH servers validated.

Bug: 212364676
Test: ran "dnschk --attempts 1000 --randomname"
      w/o this change it takes 36 seconds
      w/ this change it takes 32 seconds
Test: checked the log to ensure that "performing query over Https"
      is not printed when the DNS doesn't support DoH
Change-Id: I1718534889b097eb89ba12a291da0fb19f13bbbd

1 files changed, 4 insertions, 4 deletions

diff --git a/ResolverController.cpp b/ResolverController.cpp
index fedb8cc7..05cd2069 100644
--- a/ResolverController.cpp
+++ b/ResolverController.cpp
@@ -268,7 +268,7 @@ int ResolverController::getResolverInfo(int32_t netId, std::vector<std::string>*
     ResolverStats::encodeAll(res_stats, stats);
 
     const auto privateDnsStatus = PrivateDnsConfiguration::getInstance().getStatus(netId);
-    for (const auto& [server, _] : privateDnsStatus.serversMap) {
+    for (const auto& [server, _] : privateDnsStatus.dotServersMap) {
         tlsServers->push_back(server.toIpString());
     }
 
@@ -362,13 +362,13 @@ void ResolverController::dump(DumpWriter& dw, unsigned netId) {
         mDns64Configuration.dump(dw, netId);
         const auto privateDnsStatus = PrivateDnsConfiguration::getInstance().getStatus(netId);
         dw.println("Private DNS mode: %s", getPrivateDnsModeString(privateDnsStatus.mode));
-        if (privateDnsStatus.serversMap.size() == 0) {
+        if (privateDnsStatus.dotServersMap.size() == 0) {
             dw.println("No Private DNS servers configured");
         } else {
             dw.println("Private DNS configuration (%u entries)",
-                       static_cast<uint32_t>(privateDnsStatus.serversMap.size()));
+                       static_cast<uint32_t>(privateDnsStatus.dotServersMap.size()));
             dw.incIndent();
-            for (const auto& [server, validation] : privateDnsStatus.serversMap) {
+            for (const auto& [server, validation] : privateDnsStatus.dotServersMap) {
                 dw.println("%s name{%s} status{%s}", server.toIpString().c_str(),
                            server.name.c_str(), validationStatusToString(validation));
             }