Added --disable-ipv4 and --disable-ipv6 switches.

By default both enabled.

TBR=gene@chromium.org

Review URL: https://codereview.chromium.org/598433002

Cr-Commit-Position: refs/heads/master@{#296150}

cloud_print/gcp20/prototype/dns_response_builder.cc

@@ -81,7 +81,6 @@ void DnsResponseBuilder::AppendA(const std::string& service_domain_name,
   // TODO(maksymb): IP to send must depends on interface from where query was
   // received.
   if (http_ipv4.empty()) {
-    LOG(ERROR) << "Invalid IP";
     return;
   }
 
@@ -96,7 +95,6 @@ void DnsResponseBuilder::AppendAAAA(const std::string& service_domain_name,
   // TODO(maksymb): IP to send must depends on interface from where query was
   // received.
   if (http_ipv6.empty()) {
-    LOG(ERROR) << "Invalid IP";
     return;
   }
 

cloud_print/gcp20/prototype/gcp20_switches.cc

@@ -10,6 +10,8 @@
 namespace switches {
 
 const char kDisableConfirmation[] = "disable-confirmation";
+const char kDisableIpv4[] = "disable-ipv4";
+const char kDisableIpv6[] = "disable-ipv6";
 const char kDisableMethodCheck[] = "disable-method-check";
 const char kDisableXTocken[] = "disable-x-token";
 const char kDomainName[] = "domain-name";
@@ -30,6 +32,8 @@ const struct {
   const char* const arg;
 } kHelpStrings[] = {
   {kDisableConfirmation, "disables confirmation of registration", NULL},
+  {kDisableIpv4, "disables IPv4 support", NULL},
+  {kDisableIpv6, "disables IPv6 support", NULL},
   {kDisableMethodCheck, "disables HTTP method checking (POST, GET)", NULL},
   {kDisableXTocken, "disables checking of X-Privet-Token HTTP header", NULL},
   {kNoAnnouncement, "disables DNS announcements", NULL},

cloud_print/gcp20/prototype/gcp20_switches.h

@@ -8,6 +8,8 @@
 namespace switches {
 
 extern const char kDisableConfirmation[];
+extern const char kDisableIpv4[];
+extern const char kDisableIpv6[];
 extern const char kDisableMethodCheck[];
 extern const char kDisableXTocken[];
 extern const char kDomainName[];

cloud_print/gcp20/prototype/printer.cc

@@ -22,6 +22,7 @@
 #include "base/strings/string_util.h"
 #include "base/strings/stringprintf.h"
 #include "cloud_print/gcp20/prototype/command_line_reader.h"
+#include "cloud_print/gcp20/prototype/gcp20_switches.h"
 #include "cloud_print/gcp20/prototype/local_settings.h"
 #include "cloud_print/gcp20/prototype/service_parameters.h"
 #include "cloud_print/gcp20/prototype/special_io.h"
@@ -832,30 +833,51 @@ bool Printer::StartLocalDiscoveryServers() {
 bool Printer::StartDnsServer() {
   DCHECK(state_.local_settings.local_discovery);
 
+  net::IPAddressNumber ipv4;
+  net::IPAddressNumber ipv6;
+
+  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kDisableIpv4)) {
+    ipv4 = GetLocalIp("", false);
+  }
+  if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
+          switches::kDisableIpv6)) {
+    ipv6 = GetLocalIp("", true);
+  }
+
   // TODO(maksymb): Add switch for command line to control interface name.
-  net::IPAddressNumber ip = GetLocalIp("", false);
-  if (ip.empty()) {
+  if (ipv4.empty() && ipv6.empty()) {
     LOG(ERROR) << "No local IP found. Cannot start printer.";
     return false;
   }
-  VLOG(0) << "Local address: " << net::IPAddressToString(ip);
 
   uint16 port = command_line_reader::ReadHttpPort(kHttpPortDefault);
 
-  std::string service_name_prefix =
-      command_line_reader::ReadServiceNamePrefix(kServiceNamePrefixDefault +
-                                                 net::IPAddressToString(ip));
-  std::replace(service_name_prefix .begin(), service_name_prefix .end(),
-               '.', '_');
+  VLOG_IF(0, !ipv4.empty())
+      << "Local IPv4 address: " << net::IPAddressToStringWithPort(ipv4, port);
+  VLOG_IF(0, !ipv6.empty())
+      << "Local IPv6 address: " << net::IPAddressToStringWithPort(ipv6, port);
+
+  std::string service_name_prefix = kServiceNamePrefixDefault;
+  if (!ipv4.empty())
+    service_name_prefix += net::IPAddressToString(ipv4);
+  service_name_prefix =
+      command_line_reader::ReadServiceNamePrefix(service_name_prefix);
+  std::replace(
+      service_name_prefix.begin(), service_name_prefix.end(), '.', '_');
 
   std::string service_domain_name =
       command_line_reader::ReadDomainName(
           base::StringPrintf(kServiceDomainNameFormatDefault,
                              base::RandInt(0, INT_MAX)));
 
-  ServiceParameters params(kServiceType, kSecondaryServiceType,
-                           service_name_prefix, service_domain_name,
-                           ip, GetLocalIp("", true), port);
+  ServiceParameters params(kServiceType,
+                           kSecondaryServiceType,
+                           service_name_prefix,
+                           service_domain_name,
+                           ipv4,
+                           ipv6,
+                           port);
 
   return dns_server_.Start(params,
                            command_line_reader::ReadTtl(kTtlDefault),

cloud_print/gcp20/prototype/privet_http_server.cc

@@ -108,7 +108,10 @@ bool PrivetHttpServer::Start(uint16 port) {
 
   scoped_ptr<net::ServerSocket> server_socket(
       new net::TCPServerSocket(NULL, net::NetLog::Source()));
-  server_socket->ListenWithAddressAndPort("0.0.0.0", port, 1);
+  std::string listen_address = "::";
+  if (base::CommandLine::ForCurrentProcess()->HasSwitch(switches::kDisableIpv6))
+    listen_address = "0.0.0.0";
+  server_socket->ListenWithAddressAndPort(listen_address, port, 1);
   server_.reset(new net::HttpServer(server_socket.Pass(), this));
 
   net::IPEndPoint address;