commit dadc5f850ee7a4dbe9ed418ae9d363b237f7a0e8
author Lorenzo Colitti <lorenzo@google.com> Sat Nov 29 13:54:25 2014 +0900
committer Lorenzo Colitti <lorenzo@google.com> Mon Dec 01 11:47:11 2014 +0900
tree c61e463b5d56e09f334ef6ab2430c51667b31c28
parent 584dbee59ceb7750e22c48371342635aa6a98517

Add a command to clear a network's DNS servers.

Bug: 18327075
Change-Id: I0df13ff4a17ee65e640be96695a3af31b020963a

server/CommandListener.cpp

diff --git a/server/CommandListener.cpp b/server/CommandListener.cpp
index f97ac57..b8bcf1a 100644
--- a/server/CommandListener.cpp
+++ b/server/CommandListener.cpp
@@ -806,6 +806,14 @@
                     "Wrong number of arguments to resolver setnetdns", false);
             return 0;
         }
+    } else if (!strcmp(argv[1], "clearnetdns")) { // "resolver clearnetdns <netId>"
+        if (argc == 3) {
+            rc = sResolverCtrl->clearDnsServers(strtoul(argv[2], NULL, 0));
+        } else {
+            cli->sendMsg(ResponseCode::CommandSyntaxError,
+                    "Wrong number of arguments to resolver clearnetdns", false);
+            return 0;
+        }
     } else if (!strcmp(argv[1], "flushnet")) { // "resolver flushnet <netId>"
         if (argc == 3) {
             rc = sResolverCtrl->flushDnsCache(strtoul(argv[2], NULL, 0));

server/ResolverController.cpp

diff --git a/server/ResolverController.cpp b/server/ResolverController.cpp
index a5d69ae..639423d 100644
--- a/server/ResolverController.cpp
+++ b/server/ResolverController.cpp
@@ -38,6 +38,14 @@
     return 0;
 }
 
+int ResolverController::clearDnsServers(unsigned netId) {
+    _resolv_set_nameservers_for_net(netId, NULL, 0, "");
+    if (DBG) {
+        ALOGD("clearDnsServers netId = %u\n", netId);
+    }
+    return 0;
+}
+
 int ResolverController::flushDnsCache(unsigned netId) {
     if (DBG) {
         ALOGD("flushDnsCache netId = %u\n", netId);

server/ResolverController.h

diff --git a/server/ResolverController.h b/server/ResolverController.h
index 0c245d7..39f002d 100644
--- a/server/ResolverController.h
+++ b/server/ResolverController.h
@@ -27,6 +27,7 @@
 
     int setDnsServers(unsigned netid, const char * domains, const char** servers,
             int numservers);
+    int clearDnsServers(unsigned netid);
     int flushDnsCache(unsigned netid);
     // TODO: Add deleteDnsCache(unsigned netId)
 };