Index: net/dns/dns_session.cc |
diff --git a/net/dns/dns_session.cc b/net/dns/dns_session.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..a524500926f62951bd7fd326a6d83bfcc2e66ae8 |
--- /dev/null |
+++ b/net/dns/dns_session.cc |
@@ -0,0 +1,47 @@ |
+// Copyright (c) 2011 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#include "net/dns/dns_session.h" |
+ |
+#include "base/basictypes.h" |
+#include "base/bind.h" |
+#include "base/time.h" |
+#include "net/base/ip_endpoint.h" |
+#include "net/dns/dns_config_service.h" |
+#include "net/socket/client_socket_factory.h" |
+ |
+namespace net { |
+ |
+DnsSession::DnsSession(const DnsConfig& config, |
+ ClientSocketFactory* factory, |
+ const RandIntCallback& rand_int_callback, |
+ NetLog* net_log) |
+ : config_(config), |
+ socket_factory_(factory), |
+ rand_callback_(base::Bind(rand_int_callback, 0, kuint16max)), |
+ net_log_(net_log), |
+ server_index_(0) { |
+} |
+ |
+int DnsSession::NextId() const { |
+ return rand_callback_.Run(); |
+} |
+ |
+const IPEndPoint& DnsSession::NextServer() { |
+ // TODO(szym): Rotate servers on failures. |
+ const IPEndPoint& ipe = config_.nameservers[server_index_]; |
+ if (config_.rotate) |
+ server_index_ = (server_index_ + 1) % config_.nameservers.size(); |
+ return ipe; |
+} |
+ |
+base::TimeDelta DnsSession::NextTimeout(int attempt) { |
+ // TODO(szym): Adapt timeout to observed RTT. |
+ return config_.timeout * (attempt + 1); |
+} |
+ |
+DnsSession::~DnsSession() {} |
+ |
+} // namespace net |
+ |